PRIMARY INTRACRANIAL SQUAMOUS-CELL CARCINOMAS - REPORT OF 2 CASES

TWO CASES OF primary intracranial squamous cell carcinomas are reporte d. The first patient is a 57-year-old man with an epidermoid carcinoma in the right cerebellopontine angle, having histological features tha t indicated malignant transformation in a benign epidermoid cyst. The second patient is a 42-year-old man in whom squamous cell carcinoma ar ose in a pre-existing middle fossa dermoid cyst 9 years after the init ial surgical resection. The literature on primary intracranial squamou s cell carcinomas is reviewed, and the clinical features and histologi cal pathogenesis for the ccurrence of this unique condition are discus sed.