HPS5 and Hermansky-Pudlak syndrome: Currently, OMIM (On line Mendelian Inheritance of Man) describes 10 genetic subtypes of HPS: type 1 (due to mutations in HPS1), type 2 (AP3B1), type 3 (HPS3), type 4 (HPS4), type 5 (HPS5), type 6 (HPS6), type 7 (DTNBP1), type 8 (BLOC1S3), type 9 (BLOC1S6), and type 10 (AP3D1) [2].