Patau syndromePatau syndrome
, also known as Trisomy 13
, is a chromosomal
aberration, a disease
in which a patient has an additional chromosome 13.
Most babies suffering from Patau syndrome will not survive infancy; those who do will suffer from a learning disability.
Patients with the so-called mosaic form of Patau syndrome have only some of their cells carrying the additional copy of chromosome 13. The severity of the disease depends on the ratio of affected to unaffected cells.