hereditary disease tetrasomy 18p https://github.com/monarch-initiative/mondo/issues/3492 https://www.malacards.org/card/tetrasomy_18p MEDGEN:167079 UMLS:C0795868 ICD9:758.89 MESH:C538306 tetrasomy type 18p SCTID:698849002 MONDO:0013668 Isochromosome 18p tetrasomy 18p tetrasomy chromosome 18p icd11.foundation:1182006735 GARD:0000035 chromosome 18p tetrasomy Tetrasomy 18p is a very rare structural chromosomal anomaly affecting multiple body systems and characterized clinically by craniofacial abnormalities, delayed development, cognitive impairment, changes in muscle tone, distinctive facial features, and rarely renal malformations. OMIM:614290 Orphanet:3307 tetrasomy type 18P partial trisomy/tetrasomy of the short arm of chromosome 18