Combined immunodeficiency due to GINS1 deficiency

A rare syndrome with combined immunodeficiency characterized by intrauterine and postnatal growth retardation, chronic neutropenia, and natural killer (NK) cell deficiency due a defect in DNA replication leading to blockade of immune cell differentiation in the bone marrow, particularly affecting NK cells. Other clinical features include recurrent viral and bacterial infections and eczema, as well as mild facial dysmorphism.