A case of radionecrosis mimicking metastatic tumor of the cerebral hemisphere.

A case of delayed radiation necrosis of the cerebral hemisphere in a patient with irradiation after orbital adenocarcinoma surgery is presented in order to warn of a possible misdiagnosis with a metastatic CNS tumor. In the case surgical treatment of orbital adenocarcinoma was followed by X-ray therapy. Focal necrotic changes appearing two years later were the cause of neurological symptoms.