This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Weight gain is seen in all of the following except: March 2009 
Select and explain. 
A. Phaeochromocytoma, B. Hypothyroidism, C. Insulinoma, D. Cushing's syndrome
A: Phaeochromocytoma
Answer: A: Phaeochromocytoma 
Explanation: Ans. A: Phaeochromocytoma Medical causes of weight gain: Olanzapine Ethinylestradiol Trifluperidol Orchidectomy Pizotifen Hypothyroidism Clozapine Mianserin Cyproterone Haloperidol Cushing's syndrome Insulinfinsulinoma Prednisolone Testosterone Growth hormone secreting pituitary tumour Phaeochromocytoma is associated with weight loss.