Yaldiz, SYaldiz, DTulay, CMIsisag, A2024-07-182024-07-181301-5680http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/4677Neuroendocrine carcinomas of the thymus are rare clinical entities, which can be complicated by endocrine abnormalities. These tumors are frequently associated with ectopic adrenocorticotropic hormone production giving rise to Cushing's syndrome. Herein, we describe a 23-year-old male case with upper gastrointestinal bleeding as the initial presentation of a thymic neuroendocrine carcinoma. This case was reported due to its extremely exceptional occurrence.EnglishTUMORSArticle