title: Pseudotumoral form of primary progressive tuberculosis: a diagnosis to be considered.
abstract: The diversity of clinical presentations of primary progressive tuberculosis (TB) and the difficulty in establishing the diagnosis of paucibacillary forms is the subject of painstaking research, as well as a cause of delay in therapy. We report the case of a 10-year-old black child who presented with chest pain and progressive widening of the upper mediastinum. Computerized tomography of the chest revealed multiple calcifications that were not identified with X-rays. Biopsy through mediastinoscopy was compatible with a diagnosis of tuberculosis. Despite exhaustive investigation that included direct examination, culture for mycobacteria and PCR (Polymerase Chain Reaction) of tissue samples, the etiologic agent was not revealed. Tuberculin conversion was observed during the follow-up and resolution period of the lesion, after administration of isoniazid, rifampicin and pyrazinamide. The nodal pseudotumoral form of tuberculosis is rare in immunocompetent children and it may simulate neoplastic disease; therefore, it should be included in the list of differential diagnoses of masses located in the anterosuperior mediastinum.
authors.affiliation: Octávio Mangabeira Hospital, Faculty of Medcine of Federal University of Bahia, Laboratory of Pathological Anatomy of "Fundação José Silveira", Salvador/BA, Brazil. rosanafranco@uol.com.br
authors.forename: Rosana
authors.initials: R
authors.lastname: Franco
authors.forename: Maria Angélica
authors.initials: MA
authors.lastname: Santana
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Coelho Filho
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Pereira-Silva
mesh_terms: D001706:Biopsy; D002648:Child; D005260:Female; D006801:Humans; D008479:Mediastinal Neoplasms / Q000175:diagnosis*; D008481:Mediastinoscopy; D016133:Polymerase Chain Reaction; D014057:Tomography, X-Ray Computed; D014374:Tuberculin Test; D014388:Tuberculosis, Lymph Node / Q000175:diagnosis*