You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Unilateral ptosis is NOT seen In? and explain in detail?
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.