has part has part characteristic of inheres in has modifier platelet Giant platelets Giant platelets are larger than 7 micrometers and usually 10 to 20 micrometers. The term giant platelet is used when the platelet is larger than the size of the average red cell in the field. (Description adapted from College of American Pathologists, Hematology Manual, 1998). UMLS:C0333864 This phenotype may be present in myelodysplastic or myeloproliferative diseases and autoimmune thrombocytopenia (associated with severe leukemoid reactions). It may also be present in inherited diseases such as Bernard-Soulier syndrome or May-Hegglin anomaly. SNOMEDCT_US:44687006 HP:0001902 Increased mean platelet volume abnormal gigantic