33-Year-Old Male with Intra Abdominal Lump

Extraskeletal Ewings sarcoma (EES) / Primitive neuroectodermal tumors (PNET) are uncommon, highly aggressive small blue round cell tumors that primarily affects children and young adults. EES commonly affects the bones of the extremities although many have reported unusual primary sites such as intracranial, breast, larynx, pulmonary, retroperitoneum and small bowel mesentery. To our knowledge, after extensive search, only one case have been reported of EES in the mesocolon of an adult. We report a 2nd case of EES affecting the mesocolon in an adult.