partial deletion of the long arm of chromosome 3 3q26q27 microdeletion syndrome https://github.com/monarch-initiative/mondo/issues/3664 https://www.malacards.org/card/3q26q27_microdeletion_syndrome monosomy 3q26q27 MEDGEN:1668723 Del(3)(q26q27) 3q26-q27microdeletion syndrome Orphanet:356947 monosomy 3q26-q27 GARD:0021534 MONDO:0018156 UMLS:C4755255