In contrast, inherited platelet number disorders (IPNDs), including major disorders with about 41% MYH9-related disorders, 22% ANKRD26-related thrombocytopenia, 19% monoallelic BSS, and 8% ETV6-related thrombocytopenia, had a median bleeding score of 2, and ISTH-BAT had a poor discrimination power between IPND and healthy controls. This evidence concerns the gene MYH9 and Thrombocytopenia.