Atypical tuberculosis in the pediatric patient: implications for the pediatric surgeon.

Atypical species of mycobacteria (AMB) are now the most common cause of granulomatous lymphadenopathy. It is important for pediatric surgeons to be aware of this disease, because excision is the mainstay of therapy. We have reviewed the experience with this disease in Alberta by reviewing the records of the Provincial Laboratory of Public Health from 1979 to 1990. This facility reviews all tuberculosis cultures for the province. A total of 74 cases of infection caused by AMB were identified in patients under the age of 15. Complete records were available for 53 of these cases. These infections were characterized by a short history (11.2 weeks) of remarkably nontender regional lymphadenopathy (usually cervicofacial, 45/50) in young (average age, 13.6 months), caucasian (48/53) children. Attempts to treat these lesions by incision and drainage or drug therapy were unsuccessful (12/12 failed), whereas primary excision was successful in 33 of 37 cases. Secondary excisions were also successful in 16 of 16 cases where required. The annual rate of AMB over the study period was 1.21 cases per 100,000 children; the rate of M tuberculosis lymphadenopathy was 0.3 per 100,000. In the absence of specific risk factors for human tuberculosis (family history, native Indian or Asian ethnic origin) AMB is the most likely cause of prolonged painless lymphadenopathy and should be treated early by complete excision.