Of the 20 confirmed diagnoses, one case in the IPND Group had a MYH9 macrothrombocytopenia confirmed by a genetic panel, and 19 in the IPFD Group had Glanzmann thrombasthenia (13 cases), Bernard-Soulier syndrome (five cases) and storage pool disease (one case) confirmed by electron microscopy. Here, MYH9 is linked to Glanzmann thrombasthenia.