Clinical features associated with the chromosomal deletion syndrome manifested by an 18 ring (46,18r).
D000367:Age Factors; D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D003582:Cytogenetics; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D008423:Maternal Age