Which of the following is a radio-resistant tumor?: (A) Ewing's sarcoma, (B) Malignant fibrous histiocytoma, (C) Seminoma, (D) Dysgerminoma
Answer is B. Malignant fibrous histiocytoma is a soft tissue sarcoma. 10% of it occur in the head and neck. It mostly occur in adults 50-60 years of age. It has poor prognosis. Has high rate of recurrence following surgery. It is radioresistant and does not respond to chemotherapy.