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Mycobacterium tuberculosis as a cause of mandibular osteomyelitis in a young woman: a case report

Identifieur interne : 000984 ( Pmc/Corpus ); précédent : 000983; suivant : 000985

Mycobacterium tuberculosis as a cause of mandibular osteomyelitis in a young woman: a case report

Auteurs : Jorge Tellez-Rodriguez ; Rubi Lopez-Fernandez ; Rodolfo Rodriguez-Jurado ; Hayde Nallely Moreno-Sandoval ; Francisco Martinez-Perez ; Juan Antonio Gonzalez-Barrios

Source :

RBID : PMC:5175378

Abstract

Background

Tuberculosis is considered an emerging disease worldwide; in the last 10 years, its incidence has increased to more than 9.6 million cases of active tuberculosis. In 2014, it resulted in 1.5 million patient deaths. However, oral presentation with bone involvement occurs in less than 3% of all reported cases and rarely arouses clinical suspicion on initial presentation.

Case presentation

A 15-year-old Mexican girl who had a previous diagnosis of neurofibromatosis presented to our hospital with pain and swelling in the region of the left mandibular body since November 2011. A clinical examination revealed pain in the mandibular region, a mass of soft consistency that seemed to involve bone, and a fistula with discharge of intraoral purulent material. Additionally, tachycardia and hyperthermia were observed. The left submental and submandibular regions had a 12-cm-diameter swelling, which was well-delineated and nonerythematous. The final diagnosis was established by real-time polymerase chain reaction.

Conclusions

The final diagnosis of rare cases of tuberculous osteomyelitis in the jaw can be established by deoxyribonucleic acid (DNA) identification of Mycobacterium tuberculosis in the lesion. Simple and fast complementary diagnosis by real-time polymerase chain reaction is a fundamental approach to establishing early and effective pharmacological and surgical treatment.


Url:
DOI: 10.1186/s13256-016-1118-x
PubMed: 27998317
PubMed Central: 5175378

Links to Exploration step

PMC:5175378

Le document en format XML

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<name sortKey="Rodriguez Jurado, Rodolfo" sort="Rodriguez Jurado, Rodolfo" uniqKey="Rodriguez Jurado R" first="Rodolfo" last="Rodriguez-Jurado">Rodolfo Rodriguez-Jurado</name>
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<name sortKey="Moreno Sandoval, Hayde Nallely" sort="Moreno Sandoval, Hayde Nallely" uniqKey="Moreno Sandoval H" first="Hayde Nallely" last="Moreno-Sandoval">Hayde Nallely Moreno-Sandoval</name>
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<title>Case presentation</title>
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<journal-id journal-id-type="nlm-ta">J Med Case Rep</journal-id>
<journal-id journal-id-type="iso-abbrev">J Med Case Rep</journal-id>
<journal-title-group>
<journal-title>Journal of Medical Case Reports</journal-title>
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<publisher-name>BioMed Central</publisher-name>
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<article-id pub-id-type="pmc">5175378</article-id>
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<article-title>
<italic>Mycobacterium tuberculosis</italic>
as a cause of mandibular osteomyelitis in a young woman: a case report</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Tellez-Rodriguez</surname>
<given-names>Jorge</given-names>
</name>
<address>
<email>jorgetellezmaxilo@hotmail.com</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Lopez-Fernandez</surname>
<given-names>Rubi</given-names>
</name>
<address>
<email>dra_rubylopez@yahoo.com.mx</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Rodriguez-Jurado</surname>
<given-names>Rodolfo</given-names>
</name>
<address>
<email>rrrj60@hotmail.com</email>
</address>
<xref ref-type="aff" rid="Aff2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Moreno-Sandoval</surname>
<given-names>Hayde Nallely</given-names>
</name>
<address>
<email>nallems@hotmail.com</email>
</address>
<xref ref-type="aff" rid="Aff3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Martinez-Perez</surname>
<given-names>Francisco</given-names>
</name>
<address>
<email>fjmartin@uis.edu.co</email>
</address>
<xref ref-type="aff" rid="Aff4">4</xref>
</contrib>
<contrib contrib-type="author" corresp="yes">
<name>
<surname>Gonzalez-Barrios</surname>
<given-names>Juan Antonio</given-names>
</name>
<address>
<email>jantgonzalez69@gmail.com</email>
</address>
<xref ref-type="aff" rid="Aff3">3</xref>
</contrib>
<aff id="Aff1">
<label>1</label>
Departamento de Cirugía Maxilofacial, Insurgentes sur 3700, Letra C, Col. Insurgentes Cuicuilco, Mexico City, Mexico</aff>
<aff id="Aff2">
<label>2</label>
Departamento de Anatomía Patológica del Instituto Nacional de Pediatría, Insurgentes sur 3700, Letra C, Col. Insurgentes Cuicuilco, Mexico City, Mexico</aff>
<aff id="Aff3">
<label>3</label>
Laboratorio de Medicina Genómica, Hospital Regional “1o. de Octubre”, Avenida Instituto Politécnico Nacional 1669, Mexico City, 07760 Mexico</aff>
<aff id="Aff4">
<label>4</label>
Laboratorio de Genómica de Celomados, Grupo de Investiagición en Microbiología y Genética, Escuela de Biología, Universidad Industrial de Santander, Carrera 27, Calle 9, Bucaramanga, 680002 Santander Colombia</aff>
</contrib-group>
<pub-date pub-type="epub">
<day>20</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="pmc-release">
<day>20</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="collection">
<year>2016</year>
</pub-date>
<volume>10</volume>
<elocation-id>366</elocation-id>
<history>
<date date-type="received">
<day>6</day>
<month>5</month>
<year>2016</year>
</date>
<date date-type="accepted">
<day>24</day>
<month>10</month>
<year>2016</year>
</date>
</history>
<permissions>
<copyright-statement>© The Author(s). 2016</copyright-statement>
<license license-type="OpenAccess">
<license-p>
<bold>Open Access</bold>
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>
), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/publicdomain/zero/1.0/">http://creativecommons.org/publicdomain/zero/1.0/</ext-link>
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<abstract id="Abs1">
<sec>
<title>Background</title>
<p>Tuberculosis is considered an emerging disease worldwide; in the last 10 years, its incidence has increased to more than 9.6 million cases of active tuberculosis. In 2014, it resulted in 1.5 million patient deaths. However, oral presentation with bone involvement occurs in less than 3% of all reported cases and rarely arouses clinical suspicion on initial presentation.</p>
</sec>
<sec>
<title>Case presentation</title>
<p>A 15-year-old Mexican girl who had a previous diagnosis of neurofibromatosis presented to our hospital with pain and swelling in the region of the left mandibular body since November 2011. A clinical examination revealed pain in the mandibular region, a mass of soft consistency that seemed to involve bone, and a fistula with discharge of intraoral purulent material. Additionally, tachycardia and hyperthermia were observed. The left submental and submandibular regions had a 12-cm-diameter swelling, which was well-delineated and nonerythematous. The final diagnosis was established by real-time polymerase chain reaction.</p>
</sec>
<sec>
<title>Conclusions</title>
<p>The final diagnosis of rare cases of tuberculous osteomyelitis in the jaw can be established by deoxyribonucleic acid (DNA) identification of
<italic>Mycobacterium tuberculosis</italic>
in the lesion. Simple and fast complementary diagnosis by real-time polymerase chain reaction is a fundamental approach to establishing early and effective pharmacological and surgical treatment.</p>
</sec>
</abstract>
<kwd-group xml:lang="en">
<title>Keywords</title>
<kwd>Tuberculosis</kwd>
<kwd>Osteomyelitis</kwd>
<kwd>
<italic>Mycobacterium tuberculosis</italic>
</kwd>
<kwd>Jaw</kwd>
<kwd>Case report</kwd>
</kwd-group>
<custom-meta-group>
<custom-meta>
<meta-name>issue-copyright-statement</meta-name>
<meta-value>© The Author(s) 2016</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
<body>
<sec id="Sec1" sec-type="introduction">
<title>Background</title>
<p>Tuberculosis is considered an emerging disease worldwide. The World Health Organization estimated that the incidence of tuberculosis increased in the last 10 years to more than 9.6 million cases of active tuberculosis, and that it caused 1.5 million patient deaths in 2014. Approximately 1 million children were infected by
<italic>Mycobacterium tuberculosis</italic>
and 140,000 children died as a result of tuberculosis. By the end of 2014, an additional 480,000 cases of multidrug-resistant tuberculosis were reported worldwide [
<xref ref-type="bibr" rid="CR1">1</xref>
]. Tuberculosis is rarely confined to bone and develops frequently secondary to a systemic infection. However, oral presentation with bone involvement occurs in less than 3% of all reported cases; thus, it rarely arouses clinical suspicion at initial presentation. Mandibular osteomyelitis caused by
<italic>M. tuberculosis</italic>
infection is a rare medical condition. Because tuberculosis infection is rarely confined to bone tissue, such a manifestation may be considered as an extrapulmonary complication.</p>
<p>Adults are more frequently affected, although cases in children have also been described [
<xref ref-type="bibr" rid="CR2">2</xref>
<xref ref-type="bibr" rid="CR5">5</xref>
]. Tuberculous lesions of the oral cavity are quite rare; despite the high incidence of the systemic disease, they can be explained by
<italic>M. tuberculosis</italic>
inhibition by the salivary components [
<xref ref-type="bibr" rid="CR6">6</xref>
]. The mechanism of propagation of tuberculosis infection to the mandibular bone can be by direct inoculation through dental extraction, lesions of the mucosa during teeth eruption, and spread from adjacent tissue or via a hematogenous route [
<xref ref-type="bibr" rid="CR7">7</xref>
]. The clinical presentation and radiological imaging of mandibular tuberculosis are similar to those of chronic secondary osteomyelitis and regular dentoalveolar abscess. However, cervical lymphadenopathy produces discrete or diffuse masses, which are often not sensitive to palpation. These can be distinctive features in some patients [
<xref ref-type="bibr" rid="CR8">8</xref>
]. This similarity to conventional cases of osteomyelitis emphasizes the importance of considering a differential diagnosis of tuberculous osteomyelitis of the jaw, especially if the patient has a suspicious medical record for tuberculosis [
<xref ref-type="bibr" rid="CR9">9</xref>
,
<xref ref-type="bibr" rid="CR10">10</xref>
]. The clinical lesions of oral tuberculosis present as painful and irregular ulcers, especially in the posterior tongue area, pharynx, or palate, and they are frequently secondary to active pulmonary tuberculosis [
<xref ref-type="bibr" rid="CR11">11</xref>
]. Bone involvement of the maxilla and mandible can produce tuberculous osteomyelitis by occult spread of the microorganism [
<xref ref-type="bibr" rid="CR12">12</xref>
], and regional lymphadenopathy usually accompanies the oral lesions. For this reason, inclusion of scrofula in the differential diagnosis is obligatory [
<xref ref-type="bibr" rid="CR13">13</xref>
]. Sometimes, bone invasion can lead to tuberculosis-related osteomyelitis. The incidence is higher in poor and densely populated areas, areas of low socioeconomic status, and in human immunodeficiency virus (HIV)-infected and immunocompromised individuals [
<xref ref-type="bibr" rid="CR11">11</xref>
]. The differential diagnosis of oral tuberculosis includes other important diseases, such as squamous cell carcinoma; primary syphilis and various oral lesions, such as actinomycosis; fungal lung diseases, such as histoplasmosis, coccidioidomycosis, and blastomycosis; lymphoma; and submandibular sialadenitis [
<xref ref-type="bibr" rid="CR11">11</xref>
]. It is important to remember that trauma is the leading cause of oral ulcers and should be included in the differential diagnosis, and all oral ulcers that raise suspicion of tuberculosis require biopsy to exclude cancer.</p>
<p>Radiographic features of acute osteomyelitis are usually not immediately apparent. First, the exudate progresses through the soft tissue component through the preexisting medullary spaces. Until the trabecular bone components have resorbed significantly, the magnitude of the destruction will be evident on radiographs as macular, mottled, or fuzzy in appearance with feathered edges and accompanied by unresorbed fragments of dead bone surrounded by large purulent areas. The chronic osteomyelitis area has a mottled appearance and is radio-opaque, which is designated as osteosclerosis that can be limited to the surrounding tooth root area. In other cases, it can induce osteosclerosis of larger areas or areas of edentulous bone [
<xref ref-type="bibr" rid="CR14">14</xref>
].
<italic>M. tuberculosis</italic>
induces a specific response in infected tissues that are characterized by local areas of macrophages surrounded by lymphocytes and fibroblasts, where the macrophages develop an abundant eosinophilic cytoplasm similar to the epithelial cells that are known to be like epithelioid cells. The fusion of macrophages gives them the appearance of giant Langerhans cells in which the nuclei are distributed in episomal form, characteristic of the histological diagnosis of bone tuberculosis [
<xref ref-type="bibr" rid="CR12">12</xref>
].</p>
</sec>
<sec id="Sec2">
<title>Case presentation</title>
<p>A 15-year-old Mexican girl was referred to our hospital with a previous diagnosis of neurofibromatosis (NF), and reported pain and swelling in the region of the left mandibular body for the last 5 months. Her clinical history revealed antecedents of NF type 1, and her clinical examination disclosed pain in the mandibular region during palpation, a mass of soft consistency that seemed to involve bone, with a fistula and discharge of intraoral purulent material, tachycardia, and hyperthermia (39 °C). The left submental and submandibular regions had a 12-cm-diameter swelling and well-delineated, nonerythematous hyperthermia. An intraoral examination showed tooth mobility and few purulent exudate outputs. Laboratory studies provided the following relevant results: hemoglobin 12 g/dl, hematocrit 36.7%, and leukocytes 6.9 × 10
<sup>3</sup>
/μl. The differential white blood cell count showed neutrophils 4.2 × 10
<sup>3</sup>
/μl, lymphocytes 1.3 × 10
<sup>3</sup>
/μl, monocytes 1.1 × 10
<sup>3</sup>
/μl, eosinophils 0.3 × 10
<sup>3</sup>
/μl, basophils 0.09 × 10
<sup>3</sup>
/μl, and platelets 192 × 10
<sup>3</sup>
/μl. Computed tomography (CT) (Fig. 
<xref rid="Fig1" ref-type="fig">1a and b</xref>
) and three-dimensional reconstruction by CT showed erosion and perforations of cortical periosteal bone formation of the left hemimandible (Fig. 
<xref rid="Fig1" ref-type="fig">1c and d</xref>
). Single-photon emission computed tomography (SPECT) coupled with CT performed with technetium-99 m-ciprofloxacin (SPECT/CT
<sup>99m</sup>
Tc-ciprofloxacin) revealed an abnormally concentrated area of radiolabeled antibiotic at the left mandible, right elbow, and soft tissues of the right hand, suggesting a disseminated infectious process (Fig. 
<xref rid="Fig2" ref-type="fig">2a–c</xref>
). An intraoral secretion bacteriological culture isolated
<italic>Streptococcus parasanguinis</italic>
and high-level gentamicin- and vancomycin-resistant
<italic>Enterococcus faecium</italic>
. An antibiogram shows resistance to ampicillin, erythromycin, vancomycin, cefazolin, gentamicin, streptomycin, levofloxacin, oxacillin, and penicillin G, as well as sensitivity to daptomycin, doxycycline, linezolid, moxifloxacin, nitrofurantoin, quinupristin/dalfopristin, and rifampicin (RIF).
<fig id="Fig1">
<label>Fig. 1</label>
<caption>
<p>Clinical imaging of our patient with tuberculous osteomyelitis in the left mandible showing left-sided cheek swelling. (
<bold>a</bold>
) Frontal and (
<bold>b</bold>
) lateral views displaying mandible tuberculosis symptoms. (
<bold>c</bold>
) Frontal and (
<bold>d</bold>
) lateral views of three-dimensional reconstruction by computed tomography showing erosion and perforations of the cortical periosteal bone</p>
</caption>
<graphic xlink:href="13256_2016_1118_Fig1_HTML" id="MO1"></graphic>
</fig>
<fig id="Fig2">
<label>Fig. 2</label>
<caption>
<p>Technetium-99 m-ciprofloxacin accumulation in the mandible. Images show an abnormal concentrated area of radiolabeled antibiotic at the level of the left mandible, suggesting an infectious disease process. (
<bold>a</bold>
) Frontal view. (
<bold>b</bold>
) Oblique view. (
<bold>c</bold>
) Lateral view. The
<italic>arrows</italic>
indicate the site of 99mTc-Ciprofloxacine accumulation</p>
</caption>
<graphic xlink:href="13256_2016_1118_Fig2_HTML" id="MO2"></graphic>
</fig>
</p>
<p>The presumptive diagnosis was mandibular osteomyelitis. To corroborate the diagnosis, an incisional biopsy was done. The patient had received previous antibiotic administration with procaine benzylpenicillin (600,000 U intravenous therapy) combined with benzylpenicillin sodium (200,000 U intravenous therapy) and metronidazole (500 mg oral therapy) every 8 h for 7 days. Macroscopic and histopathological study revealed an extensive chronic osteomyelitic process (Fig. 
<xref rid="Fig3" ref-type="fig">3a and b</xref>
) due to infection that did not cease with antibiotic administration. This raised the possibility of tuberculous osteomyelitis. To identify mycobacteria as a causative agent, molecular diagnostics for tuberculosis was performed for the high diagnostic value [
<xref ref-type="bibr" rid="CR15">15</xref>
].
<italic>M. tuberculosis</italic>
molecular identification and drug resistance to isoniazid (INH), RIF, fluoroquinolone (FQ), and aminoglycoside (AG) were done using Anyplex plus mycobacterium tuberculosis/nontuberculous mycobacteria/drug-resistant tuberculosis (MTB/NTM/DR-TB) real-time test (Seegene, Seoul, Korea) in accordance with the manufacturer’s specifications. The polymerase chain reaction (PCR) data confirmed the final molecular diagnosis of disseminated and chronic tuberculous osteomyelitis of the mandible caused by
<italic>M. tuberculosis</italic>
(Fig. 
<xref rid="Fig3" ref-type="fig">3c</xref>
), and no isoniazid (INH) or rifampicin (RIF) resistance was found by the GenoType multidrug-resistant tuberculosis (MTBDR) test (Hain Lifescience, Nehren, Germany).
<fig id="Fig3">
<label>Fig. 3</label>
<caption>
<p>Macroscopic and histological characteristics of jaw and real-time polymerase chain reaction-based diagnosis.
<bold>a</bold>
Macroscopic characteristics of inner side of jaw. Large eroded areas accompanied by bleeding and bone decalcification can be seen.
<bold>b</bold>
Histopathological characteristics. Extensive chronic osteomyelitis process can be seen.
<bold>c</bold>
Molecular diagnosis of tuberculous osteomyelitis of the jaw. Both markers, susceptible
<italic>Mycobacterium tuberculosis</italic>
and
<italic>M. tuberculosis</italic>
-positive control, conformed to the
<italic>M. tuberculosis</italic>
diagnosis.
<italic>S-MTB</italic>
Susceptible
<italic>Mycobacterium tuberculosis</italic>
biopsy patient sample positive for
<italic>Mycobacterium tuberculosis</italic>
,
<italic>MTB-(C+) Mycobacterium tuberculosis</italic>
-positive control,
<italic>NTM-(C+)</italic>
Nontuberculous mycobacteria-positive control,
<italic>IC</italic>
Internal control,
<italic>NC</italic>
Negative control</p>
</caption>
<graphic xlink:href="13256_2016_1118_Fig3_HTML" id="MO3"></graphic>
</fig>
</p>
<p>The patient received initial antituberculosis therapy with 300 mg INH, 600 mg RIF, 1.6 g pyrazinamide, and 1 g ethambutol (EMB) for 2 months, followed by maintenance treatment with 300 mg INH and 600 mg RIF. At the sixth month of tuberculosis therapy, the patient developed thrombosis of the inferior alveolar artery that produced extensive jawbone necrosis, which was considered irrecoverable. Thus, an elective hemimandibulectomy was performed, and the surgical defect was reconstructed by titanium plating with the condyle, and 1.2 g ETB was added to the antituberculosis maintenance therapy until 15 months of antifimic drug therapy was complete.</p>
</sec>
<sec id="Sec3">
<title>Discussion</title>
<p>NF and tuberculosis rarely coincide in a patient; however, NF type 1 may be accompanied by a common variable immunodeficiency that favors infection by
<italic>M. tuberculosis</italic>
and its systemic dissemination [
<xref ref-type="bibr" rid="CR16">16</xref>
]. In this paper, we report a case of a young woman with NF and disseminated tuberculosis affecting mainly the jaw that induced inferior alveolar artery thrombosis and irrecoverable mandibular necrosis requiring an elective hemimandibulectomy and completion of antifimic drug therapy.</p>
<p>Although bone tuberculosis, and especially the mandibular presentation [
<xref ref-type="bibr" rid="CR2">2</xref>
<xref ref-type="bibr" rid="CR5">5</xref>
], remains a rare disease it has great significance because of the significant facial deformity sequelae that occur. However, one of the dilemmas faced by the doctor is the definitive etiologic diagnosis (Table 
<xref rid="Tab1" ref-type="table">1</xref>
). In our patient’s case, different techniques used to support the clinical diagnosis included bacterial cultures, axial CT, and SPECT/CT
<sup>99m</sup>
Tc-ciprofloxacin. All results obtained using these diagnostic techniques were indicative of infectious osteomyelitis. The incisional biopsy results were not conclusive for tuberculosis, because they showed only chronic osteomyelitis with an exacerbation process without evidence of granulomatosis. It is well known that all these techniques only have the power to suggest the type of pathology; however, the techniques required to make the diagnosis, one of which is mycobacteria cultivation, are not available in most hospitals. It is well known that this technique requires a long time to reveal the etiology of the disease. Furthermore, an average of 15 days to 5 weeks has typically been required to ultimately make the diagnosis on that basis. In our patient, the Löwenstein-Jensen culture medium was negative at 40 days of cultivation. However, with advances in technology using deoxyribonucleic acid (DNA) and real-time PCR techniques, microorganism identification now occurs in less time (8 h) after sampling. The resolving power that this technique offers is until a bacterial DNA molecule is present in the sample [
<xref ref-type="bibr" rid="CR17">17</xref>
]. However, the sample type where
<italic>M. tuberculosis</italic>
was identified required a special procedure to amplify the bacterial DNA [
<xref ref-type="bibr" rid="CR15">15</xref>
], because the paraffin-embedding process alters the DNA, and the calcium from the bone is capable of inhibiting the PCR enzymes, especially the DNA polymerase. For this reason, it was decided that the quantitative PCR (qPCR) technique should be used to increase the molecular diagnostic sensitivity [
<xref ref-type="bibr" rid="CR18">18</xref>
]. For this purpose, a 90-bp segment was amplified, and its amplification was followed by hydrolysis with a TaqMan probe (Applied Biosystems, Foster City, CA, USA). According to the pathology results, the first site of infection manifestation was the mandible. This allowed us to hypothesize that the primary focus was mandibular tuberculosis, subsequently spread via the hematogenous mechanism to the left elbow and the soft tissues of the left hand; however, both foci were developed after mandibular infection without evidence of pulmonary tuberculosis. All tuberculosis infection foci also were corroborated by the qPCR technique.
<table-wrap id="Tab1">
<label>Table 1</label>
<caption>
<p>Comparative characteristics of reported tuberculous osteomyelitis of the jaw during infancy</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th>Sex, age [reference]</th>
<th>Clinical findings</th>
<th>Mandibular Region</th>
<th>Histological diagnosis</th>
<th>Methods for tuberculosis diagnosis</th>
<th>Treatment (follow-up)</th>
</tr>
</thead>
<tbody>
<tr>
<td>Male, 3 years old [
<xref ref-type="bibr" rid="CR2">2</xref>
]</td>
<td>1 month
<break></break>
Left submandibular mass
<break></break>
Lymph enlargement</td>
<td>Angle</td>
<td>Granulomatous osteomyelitis consistent with tuberculosis</td>
<td>Primary.
<break></break>
Ziehl-Neelsen staining and culturing not performed</td>
<td>Antitubercular therapy (6 months)
<break></break>
Without recurrence</td>
</tr>
<tr>
<td>Male, 4 years old [
<xref ref-type="bibr" rid="CR3">3</xref>
]</td>
<td>1 month
<break></break>
Progressive swelling on cheek, right side
<break></break>
Caries in the right second primary molar
<break></break>
Lymph nodes</td>
<td>Body
<break></break>
Angle</td>
<td>Granulomatous osteomyelitis</td>
<td>Secondary
<break></break>
Granulomatous area
<break></break>
Giant and epithelioid cells surrounded by lymphocytes and plasma cells
<break></break>
Positive Ziehl-Neelsen staining</td>
<td>Antitubercular chemotherapy (6 months)
<break></break>
Complete resolution</td>
</tr>
<tr>
<td>Female, 10 years old [
<xref ref-type="bibr" rid="CR4">4</xref>
]</td>
<td>2 months
<break></break>
Gradual swelling in left mandibular region
<break></break>
Caries in the lower left second deciduous molar
<break></break>
No evidence of lymphadenopathy</td>
<td>Body</td>
<td>Caseous granuloma</td>
<td>Primary
<break></break>
Fine-needle aspiration cytology of swelling on left side of mandible</td>
<td>Antitubercular chemotherapy for 8 months
<break></break>
Without recurrence</td>
</tr>
<tr>
<td>Female, 14 years old [
<xref ref-type="bibr" rid="CR5">5</xref>
]</td>
<td>2 months
<break></break>
Progressive swelling in the right parotid region
<break></break>
Tooth extraction 8 months ago</td>
<td>Angle</td>
<td>Epithelioid cell granuloma with caseous necrosis
<break></break>
Giant cell, Langerhans type
<break></break>
Peripheral mantle of lymphocytes</td>
<td>Primary
<break></break>
Open biopsy</td>
<td>Antitubercular therapy
<break></break>
Complete resolution</td>
</tr>
<tr>
<td>Female, 18 years old [
<xref ref-type="bibr" rid="CR6">6</xref>
]</td>
<td>8 months
<break></break>
Edema and trismus (preauricular region) of left side of face
<break></break>
Ulcerative lesion (retromolar region)
<break></break>
Lymph node enlargement</td>
<td>Ramus
<break></break>
Condyle</td>
<td>Caseous granuloma</td>
<td>Primary
<break></break>
Fine-needle aspiration cytology</td>
<td>Not started</td>
</tr>
<tr>
<td>Female, 9 years old [
<xref ref-type="bibr" rid="CR7">7</xref>
]</td>
<td>3 months
<break></break>
Progressive mandibular edema Intermittent fever
<break></break>
Lymph node</td>
<td>Angle
<break></break>
Ramus</td>
<td>Multiple epithelioid cell granulomas
<break></break>
Multinucleated giant cells
<break></break>
Caseation necrosis areas
<break></break>
Lymphocytic infiltrates</td>
<td>Primary
<break></break>
Positive Ziehl-Neelsen staining for AFB</td>
<td>Antitubercular treatment (9 months)
<break></break>
No recurrence</td>
</tr>
<tr>
<td>Female, 16 years old [
<xref ref-type="bibr" rid="CR8">8</xref>
]</td>
<td>6 months
<break></break>
No important antecedents
<break></break>
No tooth extractions or any oral trauma</td>
<td>Ramus
<break></break>
Condyle</td>
<td>Granulation tissue
<break></break>
Necrotic bone
<break></break>
Focal epithelioid cell granulomas
<break></break>
Langerhans giant cells
<break></break>
Chronic inflammatory cells</td>
<td>Primary
<break></break>
Negative sputum for Ziehl-Neelsen staining
<break></break>
Positive tuberculin skin test</td>
<td>Antitubercular treatment (9 months)
<break></break>
No recurrence</td>
</tr>
<tr>
<td>Female, 16 years old
<break></break>
[present report]</td>
<td>7 months
<break></break>
Left mandibular inflammation
<break></break>
Ulcerative lesion over the retromolar region (impacted 37)
<break></break>
Lymph node</td>
<td>Body
<break></break>
Ramus
<break></break>
Condyle</td>
<td>Chronic osteomyelitic process</td>
<td>Primary
<break></break>
Molecular diagnosis (real-time PCR)</td>
<td>Antitubercular treatment (9 months)
<break></break>
Hemimandibulectomy
<break></break>
Mandibular reconstruction
<break></break>
No recurrence (15 months)</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p>
<italic>AFB</italic>
Acid-fast bacilli,
<italic>PCR</italic>
Polymerase chain reaction</p>
</table-wrap-foot>
</table-wrap>
</p>
<p>Our patient’s case highlights the clinical difficulty in establishing the etiology and simultaneously proposes the use of molecular diagnostics on the basis of clinical suspicion [
<xref ref-type="bibr" rid="CR2">2</xref>
<xref ref-type="bibr" rid="CR5">5</xref>
]. However, we are aware that not all hospitals have access to these advanced molecular diagnostic techniques. Establishment of an etiological diagnosis is the main goal of the clinic, with an aim to set up definitive treatment. Because a positive test for
<italic>M. tuberculosis</italic>
is necessary to initiate drug therapy in Mexico, as treatment is provided by the government free of charge for the patient, our patient underwent left hemimandibulectomy and placement of a mandibular reconstruction plate in the left jaw, accompanied by a three-drug antifimic scheme including INH (300 mg/d), RIF (600 mg/d), and ETB (1.2 g/d) 9 months after surgery, to which the patient responded satisfactorily. The hemimandibulectomy was considered as an optimal treatment because the patient had developed thrombosis of the inferior alveolar artery that had produced extensive jawbone necrosis, which was considered irrecoverable with the antituberculosis therapy. Currently, the patient is healthy and recovering, without indication of systemic tuberculosis. The clinical, surgical, and pharmacological results have allowed the patient to return to her daily activities, normal social life, and academic activities.</p>
</sec>
<sec id="Sec4">
<title>Conclusions</title>
<p>The combination of NF and tuberculosis of the jaw is an extremely rare clinical condition with a high diagnostic difficulty grade. In our patient, the molecular diagnosis by qPCR played a key role in establishing the final diagnosis and surgical treatment as indicated, which allowed the patient to resume her normal activities and social relationships. Although primary tuberculous osteomyelitis of the jaw is a rare condition, it should be considered in the differential diagnosis of mandibular lesions in comparable clinical situations.</p>
<sec id="Sec5">
<title>Patient’s perspective</title>
<p>My parents and I are very happy and grateful for the care that I received from the medical staff of Pediatrics National Institute, Genomic Medicine Laboratory of the “October 1
<sup>st</sup>
” Regional Hospital, and in general, to all professionals who were involved to finally get my diagnosis, and mainly for solving my health problem.</p>
</sec>
</sec>
</body>
<back>
<glossary>
<title>Abbreviations</title>
<def-list>
<def-item>
<term>
<sup>99m</sup>
Tc</term>
<def>
<p>Technetium-99 m</p>
</def>
</def-item>
<def-item>
<term>CT</term>
<def>
<p>Computed tomography</p>
</def>
</def-item>
<def-item>
<term>MTB</term>
<def>
<p>
<italic>Mycobacterium tuberculosis</italic>
</p>
</def>
</def-item>
<def-item>
<term>NTM</term>
<def>
<p>Nontuberculous mycobacteria</p>
</def>
</def-item>
<def-item>
<term>PCR</term>
<def>
<p>Polymerase chain reaction</p>
</def>
</def-item>
<def-item>
<term>qPCR</term>
<def>
<p>Quantitative polymerase chain reaction</p>
</def>
</def-item>
<def-item>
<term>SPECT</term>
<def>
<p>Single-photon emission computed tomography</p>
</def>
</def-item>
<def-item>
<term>TB</term>
<def>
<p>Tuberculosis</p>
</def>
</def-item>
<def-item>
<term>EMB</term>
<def>
<p>Ethambutol</p>
</def>
</def-item>
<def-item>
<term>INH</term>
<def>
<p>Isoniazid</p>
</def>
</def-item>
<def-item>
<term>RIF</term>
<def>
<p>Rifampicin</p>
</def>
</def-item>
<def-item>
<term>FQ</term>
<def>
<p>Fluoroquinolone</p>
</def>
</def-item>
<def-item>
<term>AG</term>
<def>
<p>Aminoglycoside</p>
</def>
</def-item>
<def-item>
<term>S-MTB</term>
<def>
<p>Susceptible
<italic>Mycobacterium tuberculosis</italic>
</p>
</def>
</def-item>
<def-item>
<term>MTB-(C+)</term>
<def>
<p>
<italic>Mycobacterium tuberculosis</italic>
-positive control</p>
</def>
</def-item>
<def-item>
<term>NTM-(C+)</term>
<def>
<p>Nontuberculous mycobacteria-positive control</p>
</def>
</def-item>
<def-item>
<term>IC</term>
<def>
<p>Internal control</p>
</def>
</def-item>
<def-item>
<term>NC</term>
<def>
<p>Negative control</p>
</def>
</def-item>
<def-item>
<term>NF</term>
<def>
<p>Neurofibromatosis</p>
</def>
</def-item>
<def-item>
<term>AFB</term>
<def>
<p>Acid-fast bacilli</p>
</def>
</def-item>
</def-list>
</glossary>
<ack>
<title>Acknowledgements</title>
<p>We thank Dr. Paul Miranda-Aguilar and Dr. Eva Portillo Nava for their participation in the patient’s treatment and their invaluable comments on the manuscript. We especially thank the patient’s parents for allowing us to publish this case report.</p>
<sec id="FPar1">
<title>Funding</title>
<p>The project was funded by Solidarity and Social Investment Fund/Consejo Nacional de Ciencia y Tecnología (FOSIS-CONACYT) México grant S0008-2012-1 and Fondo Sectorial de Investigación en Salud y Seguridad Social (FONSEC SSA/IMSS/ISSSTE) grant 000000000181384.</p>
</sec>
<sec id="FPar2">
<title>Availability of data and materials</title>
<p>All materials described in this article are readily available to any scientist wishing to use them.</p>
</sec>
<sec id="FPar3">
<title>Authors’ contributions</title>
<p>RLF and JTR treated the patient and prepared the case report. RRJ performed the histopathological study and suggested the tuberculosis diagnosis. HNMS and FMP performed the molecular diagnosis. JAGB was the scientific advisor, conceived of and prepared the final version of this manuscript, and prepared the figures. All authors read and approved the final manuscript.</p>
</sec>
<sec id="FPar4">
<title>Competing interests</title>
<p>The authors declare that they have no competing interests.</p>
</sec>
<sec id="FPar5">
<title>Consent for publication</title>
<p>Written informed consent was obtained from the patient’s legal guardian(s) for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.</p>
</sec>
<sec id="FPar6">
<title>Ethics approval and consent to participate</title>
<p>Not applicable.</p>
</sec>
</ack>
<ref-list id="Bib1">
<title>References</title>
<ref id="CR1">
<label>1.</label>
<element-citation publication-type="journal">
<person-group person-group-type="author">
<name>
<surname>Bhatt</surname>
<given-names>AP</given-names>
</name>
<name>
<surname>Jayakrishnan</surname>
<given-names>A</given-names>
</name>
</person-group>
<article-title>Tuberculous osteomyelitis of the mandible: a case report</article-title>
<source>Int J Paediatr Dent</source>
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