True about cushing's syndrome is -
most of the cases are associated with oat cell type of bronchogenic carcinoma or with carcinoid tumor of thymus, pancreas, ovary, medullary carcinoma of thyroid, bronchial adenoma( Harrison 17 pg 2255)
Adrenomedullary hyperplasia in association wift MEN syndrome is common cause
Bronchial &Mediastinal carcinoid causes wishing syndrome
It is diagnosed by hypokalemia in association wifo increased adrenal secretion
It is often fatal due to its coronary and cerebrovascular accidents
Endocrinology