Cerebral necrosis simulating an intraparenchymal tumor.

Cerebral necrosis after radiation therapy of extracranial neoplasms is an infrequent but well-documented complication [1-5]. CT and MR findings associated with changes caused by radiation therapy have been reported; however, differentiating changes caused by irradiation from postoperative changes and recurrent tumor may not always be possible because the·CT and MR findings are nonspecific [6-8]. We report CT and MR (with Gd-DTPA) findings that mimicked those associated with recurrent tumor in a patient who had received radiation for an extracranial neoplasm.