Nasopharyngeal alveolar rhabdomyosarcoma expressing CD56: a mimicker of extranodal natural killer/T-cell lymphoma.

Alveolar rhabdomyosarcoma (ARMS) is remarkably rare in adults older than 45 years. Histologically, the tumor is composed of blue round cells with frequent expression of CD56 in addition to myogenic markers. Recent studies of ARMS have shown two specific recurrent translocations: PAX3-FKHR [t(2;13)(q35;q14)] or PAX7-FKHR [t(1;13)(p36;q14)].

Mycobacterium abscessus granulomatous prostatitis.

Infectious granulomatous prostatitis is uncommon, and most cases of granulomatous prostatitis are classified as nonspecific granulomatous prostatitis. From 2007 to 2009, 5 patients experienced poor wound healing after radical prostatectomy for prostate cancer at a specialist cancer center. Mycobacterium abscessus was cultured from the debridement specimens, and acid-fast-positive bacilli were identified histologically within the prostates.