en Radiation Biology Radiation Biology مطالعه موردي Case Report <p>Radiation induced sarcoma is a rare but recognized complication of radiotherapy and is associated with poor prognosis, frequently occurs 5 years after completion of treatment. We report radiation-induced sarcoma in a 42 years old male, involving the left parietooccipital scalp region following treatment of brain tumor with craniotomy and post-operative radiation with ⁶⁰Co machine. Diagnosis of radiation induced sarcoma was confirmed by history, latency period and biopsy. This Radiation induced malignancy was diagnosed only 2 years after completion of Radiotherapy for primary lesion.</p> Radiation induced sarcoma, brain tumor, glioblastoma multiform 383 385 http://ijrr.com/browse.php?a_code=A-10-1-533&slc_lang=en&sid=1 F. Amouzegar Hashemi 790031947532846009470 790031947532846009470 No Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital, Keshavarz Blvd, Tehran, Iran A. Maddah Safaei afsan1980@ymail.com 790031947532846009471 790031947532846009471 Yes Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital, Keshavarz Blvd, Tehran, Iran E. Esmati 790031947532846009472 790031947532846009472 No Department of Radiation Oncology, Cancer Institute, Imam Khomeini Hospital, Keshavarz Blvd, Tehran, Iran