Retrorectal Extraosseous Ewing Sarcoma/Primitive Neuroectodermal Tumor in a 59-Year-Old Man Mimicking a Tailgut Cyst: A Case Report :
Ewing sarcoma is a rare, aggressive small round-cell sarcoma that predominantly affects children and young adults. Extraosseous pelvic presentations are uncommon, particularly in older adults. We report the case of a 59-year-old man who presented with progressive asthenia, constipation, and intermittent rectal bleeding...