Mondo Description Gray platelet syndrome (GPS) is a rare inherited bleeding disorder characterized by macrothrombocytopenia, myelofibrosis, splenomegaly and typical gray appearance of platelets on Wright stained peripheral blood smear.

Uniprot Description A rare platelet disorder characterized by a selective deficiency in the number and contents of platelet alpha-granules. It is associated with mild to moderate bleeding tendency and moderate thrombocytopenia. The platelets are enlarged and have a gray appearance on light microscopy of Wright-stained peripheral blood smears due to decreased granules.

Disease Ontology Description An inherited blood coagulation disease characterized by selective deficiency in the number and contents of platelet alpha-granules, macrothrombocytopenia, enlarged platelets, myelofibrosis, splenomegaly, and increased bleeding time that has material_basis_in homozygous or compound heterozygous mutation in the NBEAL2 gene on chromosome 3p21.