PMID- 34760427 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211112 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 13 IP - 10 DP - 2021 Oct TI - Cushing's Syndrome Due to a Functional Thymic Neuroendocrine Tumor in Multiple Endocrine Neoplasia Type 1 Syndrome. PG - e18590 LID - 10.7759/cureus.18590 [doi] LID - e18590 AB - Multiple endocrine neoplasia type 1 (MEN 1) syndrome is characterized by endocrinopathies and could be associated with thymic neuroendocrine tumors (NET). On rare occasions, they can be functional adrenocorticotropic hormone-secreting thymic carcinoid leading to Cushing's syndrome. In this report, we describe a case of adrenocorticotropic hormone (ACTH)-dependent Cushing's syndrome due to a thymic NET associated with MEN type 1 syndrome. We highlight its aggressive clinical course, the premise for a high index of suspicion for an ectopic ACTH secretion, and the need for early surgical resection combined with medical therapy and alternative treatments. CI - Copyright (c) 2021, Asemota et al. FAU - Asemota, Iriagbonse R AU - Asemota IR AD - Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, USA. FAU - Ajiboye, Oyintayo AU - Ajiboye O AD - Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, USA. FAU - Nwaichi, Chineme AU - Nwaichi C AD - Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, USA. FAU - Mbachi, Chimezie AU - Mbachi C AD - Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, USA. FAU - Mba, Benjamin AU - Mba B AD - Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, USA. LA - eng PT - Case Reports DEP - 20211007 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC8572323 OTO - NOTNLM OT - acth secreting tumor OT - cushing syndrome OT - functional neuroendocrine tumor OT - men 1 OT - mutiple endocrine neoplasia type OT - net OT - neuroendocrine tumor OT - thymic tumor COIS- The authors have declared that no competing interests exist. EDAT- 2021/11/12 06:00 MHDA- 2021/11/12 06:01 PMCR- 2021/10/07 CRDT- 2021/11/11 06:57 PHST- 2020/05/28 00:00 [received] PHST- 2021/10/07 00:00 [accepted] PHST- 2021/11/11 06:57 [entrez] PHST- 2021/11/12 06:00 [pubmed] PHST- 2021/11/12 06:01 [medline] PHST- 2021/10/07 00:00 [pmc-release] AID - 10.7759/cureus.18590 [doi] PST - epublish SO - Cureus. 2021 Oct 7;13(10):e18590. doi: 10.7759/cureus.18590. eCollection 2021 Oct.