Unilateral ptosis is NOT seen In?

Ans. (b) Thyroid OpthalmopathyRef.: Harrison 19th ed. 12294-95The question is on unilateral ptosis whereas thyroid opthalmopathy has PROPTOSIS.* In myasthenia gravis, due to anti-Ach-receptor blocking antibodies there is ptosis which can be unilateral or asymmetrical which will again appear unilateral.* Marfan syndrome has congenital Ptosis.* Pancoast tumor causes horner syndrome in which unilateral sympathetic chain is compressed leading to Ptosis, Miosis, Anhidrosis, Enopthalmos and loss of Cilio-spinal reflex.