SLC45A2 and Hermansky-Pudlak syndrome: Seventy-five children with both clinical and genetic diagnosis (two pathogenic/likely pathogenic variants identified in specific genes) of albinism were included in the study (OCA1A: 17; OCA1B: 28; OCA2: 26; Hermansky Pudlak syndrome (HPS): 3; OCA4: 1).