title: [Pallister-Killian syndrome. Case report].
abstract: BACKGROUND
  Pallister-Killian syndrome is a rare sporadic genetic disorder with a tissue-specific mosaic distribution of an additional isochromosome 12p [i(12p)]. Due to the low risk of recurrence, prenatal diagnosis of this syndrome is important for the genetic counseling.
  
  
  OBJECTIVE
  To report the first prenatal diagnosis case of Pallister-Killian syndrome in Mexico (lethal neonatal presentation associated with hypoplastic left heart).
  
  
  RESULTS
  We admitted to our hospital a third-trimester, 31-year-old-pregnant woman; the level II sonographic examination showed: polyhydramnios, micromelia, hypoplastic left heart and a fetal facial profile characterized by small nose, thin upper lip and protruding lower lip. We confirmed the diagnosis with cultured amniotic cells. Standard G banding techniques showed a male karyotype with an extra chromosome i(12p) in the 100% of metaphase cells: 47,XY, + i(12p).
authors.affiliation: Servicio de ginecología y obstetricia, Hospital de Especialidades Dr. Belisario Domínguez. mariaantonieta73@hotmail.com
authors.forename: María Antonieta
authors.initials: MA
authors.lastname: Ramírez Fernández
authors.forename: Ricardo
authors.initials: R
authors.lastname: García Cavazos
authors.forename: Héctor Fernando
authors.initials: HF
authors.lastname: Sánchez Martínez
mesh_terms: D000015:Abnormalities, Multiple; D000328:Adult; D002869:Chromosome Aberrations; D005145:Face / Q000002:abnormalities*; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D007621:Karyotyping; D013577:Syndrome