Complete Trisomy 13 Syndrome

**Semantic type:** Disease or Syndrome

**Definition:** A syndrome characterized by the presence of three complete copies of genetic material for chromosome 13, instead of the normal two. It leads to a variety of abnormalities that include mental retardation, microcephaly, low-set ears, eye structural defects, polydactyly, and limb abnormalities.

**Synonyms:** - Patau Syndrome