Radio-induced simultaneous development of squamous cell carcinoma and undifferentiated pleomorphic sarcoma of scalp.

Radiotherapy was commonly applied to treat benign skin diseases such as tinea capitis. Some patients treated with radiation have developed skin malignancies over the years. This article reported a 72-year-old man presenting with two distinct non-melanoma skin tumors on his scalp, including squamous cell carcinoma and metastatic pleomorphic sarcoma.