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Syndrome reference sheet
Generated 12 Oct 2026
Genetics · Genetics / Chromosomal disorders

Pallister–Killian syndrome

Also known as: Tetrasomy 12p mosaicism

Tissue-limited tetrasomy 12p with coarse facies and hypopigmentation.

Medical specialty
Genetics
Subspecialty
Genetics / Chromosomal disorders
Sex & age distribution
Male: affected; Female: affected, equal; Children: yes, congenital
Gene(s) involved
None recorded

Etiology & mechanism

Mosaic isochromosome 12p.

Gene(s) involved (0)

No gene recorded.

Symptoms & signs (6)

coarse faciesdiaphragmatic herniapigmentary skin changesseizuressevere intellectual disabilitysparse hair
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