Cerebellopontine angle tumors in young children, displaying cranial nerve deficits, and restricted diffusion on diffusion-weighted imaging: a new clinical triad for atypical teratoid/rhabdoid tumors
Atypical teratoid/rhabdoid tumors (AT/RTs) are highly malignant CNS tumors found almost exclusively in childhood. Although essentially universally fatal when incompletely resected, prompt diagnosis followed by early chemoradiation can improve outcomes. An AT/RT can occur extraaxially at the cerebellopontine angle (CPA) and cause acute cranial nerve deficits as the presenting sign. The authors report a series of 3 children who presented with isolated acute facial nerve palsies and in whom subsequent diagnosis of a CPA AT/RT was made. The authors propose that in young children whose presenting symptom is an acute facial nerve palsy with a CPA tumor, AT/RT should be highly suspected.