Ectopic ACTH syndrome due to thymic carcinoid tumor in a girl

An 8 year-old girl had a cushingoid appearance for six months. Hormone stud y showed extremely high serum levels of cortisol (>60 mu g/dl) and adrenoco rticotropic hormone (930 pg/ml), Initial chest X-ray showed nothing unusual , but a technetium-99mm MIBI scan showed an accumulation lesion in the left upper chest cavity, Chest magnetic resonance imaging demonstrated that the mass was in the superior anterior mediastinum, She had complete removal of the tumor with partial thymectomy. The pathology revealed a thymic carcino id tumor, Carcinoid tumors of the thymus are extremely rare in children and they usually present with Gushing's syndrome. To our knowledge, this is th e youngest patient who has ever been reported with this disease.