Imaging Spectrum of Extrathoracic Tuberculosis.

The incidence of extrathoracic tuberculosis (ETB) continues to increase slowly, especially in immunocompromised and multidrug-resistant tuberculosis (TB) patients. ETB manifests with nonspecific clinical symptoms, and being less frequent, is less familiar to most physicians. Imaging modalities of choice are computed tomography (lymphadenopathy and abdominal TB) and MR imaging (central nervous system and musculoskeletal system TB). ETB commonly involves multiple organ systems with characteristic imaging findings that permit accurate diagnosis and timely management.