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.