Warkany Syndrome (Trisomy 8 Mosaicism): Life Expectancy and Care

Warkany Syndrome (Trisomy 8 Mosaicism / T8M) is a rare chromosomal disorder where some cells have an extra chromosome 8 (47,XX,+8/46,XX or 47,XY,+8/46,XY). Non-mosaic full trisomy 8 is lethal early.

Clinical Features (Variable due to Mosaicism Level)

• Craniofacial: Prominent forehead, hypertelorism, epicanthal folds, low-set ears, micrognathia, cleft lip/palate (30%).
• Skeletal: Camptodactyly, joint contractures, scoliosis, vertebral anomalies, absent/hypoplastic radii, tibias.
• Cardiac: VSD, ASD, PDA, coarctation, Tetralogy of Fallot (~50%).
• Renal/Genitourinary: Hydronephrosis, horseshoe kidney, hypospadias, cryptorchidism.
• Neurodevelopmental: Intellectual disability (mild to severe), hypotonia, seizures, speech delay.
• Other: Corneal opacities, hearing loss, immune deficiency, increased malignancy risk (AML, Wilms tumor).

Life Expectancy

• Highly variable. No single median survival figure.
• Severe cardiac/renal malformations → early mortality (infancy/childhood).
• Milder phenotypes (low mosaicism in critical tissues) → survival into adulthood documented.
• Malignancy surveillance needed lifelong.

Multidisciplinary Care

• Genetics (confirmation, counseling, recurrence risk low <1% unless parental mosaicism/gonadal).
• Cardiology, nephrology, orthopedics, neurology, developmental pediatrics.
• Early intervention (PT, OT, ST), special education.
• Immunology eval if recurrent infections.
• Oncology surveillance (CBC, renal ultrasound per protocols).

Support: Unique (rare chromosome disorder network), Chromosome 8 Registry. Prognosis improves with proactive management of congenital anomalies.