chromosomal disease Prader-Willi syndrome MESH:D011218 MIM:176270 SNOMEDCT_US_2025_09_01:205794007 GARD:5575 A chromosomal disease that is characterized by weak muscle tone, feeding difficulties, poor growth, and delayed development. Beginning in childhood, affected individuals develop an insatiable appetite, which leads to chronic overeating and obesity. ICD9CM:759.81 ICD10CM:Q87.11 disease_ontology ORDO:739 NCI:C75463 DOID:11983 OMIM mapping confirmed by DO. [SN]. Prader Willi syndrome UMLS_CUI:C0032897 syndrome