Cerebellopontine angle gumma.

A rare lesion, a gumma in the cerebellopontine angle, is reported. Gumma may mimic other more commonly occurring cerebellopontine angle tumors. The computed tomographic (CT) appearance and histological characteristics are discussed. The literature of cerebral gumma is reviewed. This is the only reported case of cerebellopontine angle gumma seen on CT scan and verified histologically at operation.