UNUSUAL CEREBELLOPONTINE ANGLE TUMORS

Fifty-nine unusual cerebello-pontine angle tumours have been studied. These lesions represent 19.3 per cent or 1 in 5 of a series of 305 cer ebello-pontine angle tumours of which the rest, 246 (80.7 per cent), w ere acoustic neuromas. An analysis of the relative incidence, histolog y and presenting clinical features has been carried out. The various r adiographical features and imaging techniques used to diagnose these f ascinating tumours have been described and also the otoneurosurgical p rocedures necessary to excise them.