Imaging of giant tumours involving the anterior skull base

Tumours involving the anterior skull base are a challenge in diagnosis and treatment. They may arise from the bony skull base itself, intracranially o r from the sinonasal tract and orbit. It is often difficult to determine th e site of origin of giant tumours as anatomical boundaries are frequently b reached. Accurate imaging evaluation is useful in planning treatment and ma y help in the differential diagnosis. We review those CT and MRI features o f giant anterior cranial fossa tumours which may be helpful in identifying a pre-operative diagnosis.