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Risk X-linked recessive; 1:3500 live male births; few known cases in females. Often undiagnosed until age 3–5 y; periop complications can occur before diagnosis. Deterioration through puberty to death usually before age 25 y. Periop risks may be present in…
Risk Trisomy 21 is the most common autosomal aneuploidy; approximately 1:1000 live births. 80% of children with this condition survive beyond 1 y; average life expectancy 60 y. Increased incidence in mothers >35 y, but most are born to younger…