MedGen

Any primary immunodeficiency disease in which the cause of the disease is a mutation in the BCL11B gene. [from MONDO]

Griscelli syndrome (GS) is a rare cutaneous disease characterized by a silvery-gray sheen of the hair and hypopigmentation of the skin, which can be associated to primary neurological impairment (type 1), immunologic impairment (type 2) or be isolated (type 3). [from ORDO]

Piebaldism is a rare autosomal dominant trait characterized by the congenital absence of melanocytes in affected areas of the skin and hair. A white forelock of hair, often triangular in shape, may be the only manifestation, or both the hair and the underlying forehead may be involved. The eyebrows and eyelashes may be affected. Irregularly shaped white patches may be observed on the face, trunk, and extremities, usually in a symmetrical distribution. Typically, islands of hyperpigmentation are present within and at the border of depigmented areas (summary by Thomas et al., 2004). [from OMIM]

An abnormal reduction in the amount of pigmentation (reduced or absent) of skin, hair and eye (iris and retina). [from HPO]