ISOLATED 3RD-NERVE PALSY ASSOCIATED WITH FRONTAL-SINUS MUCOCELE

Isolated third-nerve palsies are seen most commonly with aneurysms, va scular disease, trauma, or neoplasms (1-5). Sinus mucoceles have been known to cause orbital symptoms including proptosis and cranial nerve palsies. Rarely, an oculomotor nerve abnormality may be seen in the se tting of mucoceles of the paranasal sinuses. We describe an unusual ca se of an isolated pupil-sparing third-nerve palsy as the presenting si gn of a frontal sinus mucocele. Emphasis is placed on the discussion o f sinus mucoceles and their relation to orbital symptoms.