D2I2.
genetic

Farber disease

Farber disease is an extremely rare, progressive, storage disease caused by a of the acid ceramidase . Acid ceramidase is responsible for breaking down ceramide into sphingosine and fatty acid. When the enzyme is deficient, this leads to an accumulation of fatty material in the lysosomes of the cells, leading to the signs and symptoms of this disorder.

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