Histopathology reports suggest a poorly differentiated malignancy.
Fluorescence in situ hybridization (FISH) is positive for EWSR1 (Ewing sarcoma breakpoint region 1) gene re-arrangement.
The immunohistochemistry (IHC) panel shows the tumour is positive for CK (moderately), NKX 2.2, and CD99, which are features of Ewing sarcoma.