Additional Info: |
Approximately 50 year old man, undergoing colonoscopy for heme positive stool. The immunostaining panel is as follows: Negative for CK, EMA, SMA, desmin, CD117, Mart1, HMB45, calretinin, NSE, NFP. Weakly positive for vimentin. Multifocally positive for GFAP. Strongly positive for S100. |