"NICHD"^^ . "Complete Trisomy 21 Syndrome"^^ . . "Complete Trisomy 21 Syndrome"^^ . "C101222"^^ . . "Complete Trisomy 21 SyndromePTNCI" . "Complete Trisomy 21 SyndromePTNICHD" . "Disease or Syndrome"^^ . . "A syndrome characterized by the presence of three complete copies of genetic material for chromosome 21, instead of the normal two. It leads to a variety of abnormalities that include mental retardation, macroglossia, microgenia, epicanthic eyelids, and a single transverse palmar crease.NCI" . . . "CL435606"^^ .