CT scan of the chest showing osteomyelitis of the right clavicle due to Mycobacterium abscessus

CT scan of a 55-year-old man with disseminated M. abscessus. The infection began in the left ankle and seeded multiple other bones, including the right clavicle. The CT scan demonstrates advanced destruction of the right distal clavicle with bony fragmentation and an associated soft tissue mass. The histopathology at the time of debridement showed granulomas. This case supports the theory of locus minoris resistentiae, since this patient had received local radiation therapy to his right chest wall 30 years earlier for Hodgkin lymphoma.