This technique facilitates the phenotypic diagnosis of a BSS, α-granule deficiency-related macrothrombocytopenias (e.g., GPS and GFBI1-related thrombocytopenia), and TUBB1- and FLNA-related thrombocytopenia [29,30] (Table S1 and Figure 1). The gene discussed is TUBB1; the disease is Thrombocytopenia.