The rarest form of ACTH-dependent CS in children is ectopic Cushing’s syndrome (ECS), associated with ectopic production of ACTH or CRH, most commonly by neuroendocrine tumors such as bronchial carcinoids, gastrointestinal tumors, medullary thyroid carcinoma, or pheochromocytomas [2,4,5]. The gene discussed is POMC; the disease is digestive system neoplasm.