disease arises from structure disease arises from alteration in structure 18q (Human) syndrome caused by partial chromosomal duplication partial trisomy/tetrasomy of chromosome 18 partial trisomy of the long arm of chromosome 18 https://github.com/monarch-initiative/mondo/issues/3492 https://www.malacards.org/card/partial_duplication_of_the_long_arm_of_chromosome_18_syndrome partial trisomy of chromosome 18q MONDO:0016968 partial duplication of chromosome 18q Duplication 18q 18q partial trisomy partial trisomy of the long arm of chromosome type 18 partial duplication of the long arm of chromosome 18 18q duplication 18q trisomy MESH:C538308 UMLS:C0809935 chromosome 18q duplication Orphanet:262977 trisomy 18q MEDGEN:167200