MYH9 and Thrombocytopenia: Interestingly, we observed that platelets from a patient with the MYH-9-related thrombocytopenia May–Hegglin anomaly, caused by the frequent MYH9 mutation E1841K in the C-terminal exon 38 encoding for the tail part of non-muscle myosin heavy chain-IIA, showed normal mepacrine uptake but impaired release in response to increasing concentrations of thrombin and the GPVI agonist convulxin.