Anemia, Congenital Dyserythropoietic, Type Iv, also known as congenital dyserythropoietic anemia type iv, is related to congenital dyserythropoietic anemia and fetal hemoglobin quantitative trait locus 1. An important gene associated with Anemia, Congenital Dyserythropoietic, Type Iv is KLF1 (KLF Transcription Factor 1). Affiliated tissues include bone marrow and bone, and related phenotypes are frontal bossing and anemia