D2I2.
genetic

Smith–Lemli–Opitz syndrome

Smith–Lemli–Opitz is an inborn error of synthesis. It is an , multiple syndrome caused by a in the 7-Dehydrocholesterol reductase encoded by the DHCR7 gene. It causes a broad of effects, ranging from mild intellectual disability and behavioural problems to lethal malformations.

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Plain-language summary adapted from Wikipedia. Not medical advice.