Soft Tissue Mass in a Young Adult
Ayoub Nahal, MD
Presentation Date: August 2014; Expires August 2017
A 42 year old male presented with a 7.0 cm large right pelvic soft tissue mass. [Figures 1-2] An image-guided fine needle aspiration [Figures 3-5] and core biopsy were performed and evaluated. Confirmatory immunohistochemical studies were performed on the core biopsy, and demonstrated positivity for vimentin, CD99 (O13), FLI-1, and AE1/3 (focal), while the following immunostains were negative: CD45, CD20, CD30, CD34, CD57, Myogenin, S100, and Desmin.