Undifferentiated pleomorphic sarcoma (UPS) is a high grade neoplasm typically diagnosed in older adults and localized to the extremities or retroperitoneum. Poor response to therapy with high rates of recurrence confer this neoplasm a poor prognosis. This report of cecal UPS in a 12-year-old is rare due to the patient’s age and tumor location. Only two other cases of pediatric UPS located in the intestinal tract have been reported.