Cranial computed tomography in the tumorous stage of mycosis fungoides.

Central nervous system (CNS) involvement by mycosis fungoides (MF) is rare. This is especially true of metastatic parenchymal involvement. Findings in two patients having the tumorous stage of MF are described. Multiple, well delineated, homogeneously and markedly enhancing nodules were seen in these two patients. The computed tomographic (CT) features of CNS involvement by MF are not specific. The differential diagnosis is discussed. By using CT in patients with MF, we will eventually be able to determine the incidence of CNS involvement in this condition.