disease arises from structure disease arises from alteration in structure 20q13.33 (Human) syndrome caused by partial chromosomal deletion 20q13.33 microdeletion syndrome https://github.com/monarch-initiative/mondo/issues/3664 https://www.malacards.org/card/20q1333_microdeletion_syndrome MONDO:0016843 MEDGEN:1384661 monosomy 20q13.33 UMLS:C4518823 Del(20)(q13.33) Orphanet:261311 GARD:0020778 20q13.33 is a rare chromosomal anomaly syndrome resulting from the partial deletion of the long arm of chromosome 20 with a highly variable phenotype typically characterized by hypotonia, intellectual disability, cognitive and language deficits (including decreased or absent speech), pre and post-natal growth retardation, feeding difficulties, microcephaly, and malformed hands and feet. Neurodevelopmental disorders (including hyperactivity, social interactive problems and autism spectrum disorder), seizures and dysmorphic facial features (high forehead, hypertelorism, malformed ears, broad nasal bridge, bulbous nasal tip, thin upper lip, small chin) are frequently associated. SCTID:733520002 partial deletion of the long arm of chromosome 20