has material basis in germline mutation in NBEAL2 inherited bleeding disorder, platelet-type syndromic disease gray platelet syndrome https://rarediseases.info.nih.gov/diseases/2562/gray-platelet-syndrome https://www.malacards.org/card/gray_platelet_syndrome NCIT:C84741 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. OMIM:139090 DOID:0111044 bleeding disorder, Platelet-type, 4 GARD:0002562 MONDO:0007686 SCTID:51720005 UMLS:C0272302 marked decrease or absence of alpha-granules and of platelet-specific alpha-granule proteins Orphanet:721 GPS Alpha storage pool deficiency MEDGEN:82900 BDPLT4 platelet alpha-granule deficiency gray platelet syndrome icd11.foundation:1818085572 MESH:D055652 alpha granule disease