Term Name:	gray platelet syndrome
Synonyms:	BDPLT4, GPS, platelet alpha-granule deficiency, platelet-type bleeding disorder 4
Definition:	A blood platelet 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.
Ontology:	Human Disease [DOID:0111044]   ( DOID:0111044 )