An extra small submetacentric chromosome: possible partial 18 trisomy.
D000015:Abnormalities, Multiple / Q000235:genetics; D002648:Child; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics; D014314:Trisomy