Gain-of-function SAMD9L mutations cause a syndrome of cytopenia, immunodeficiency, MDS and neurological symptoms
Several monogenic causes of familial myelodysplastic syndrome (MDS) have recently been identified. We studied two families with cytopenia, predisposition to MDS with chromosome 7 aberrations, immunodeficiency, and progressive cerebellar dysfunction. Genetic studies uncovered heterozygous missense mutations in SAMD9L, a tumor suppressor gene located on chromosome arm 7q. Consistent with a gain-of-f