- Keratosis follicularis spinulosa decalvans is a rare skin disorder in which abnormal keratinization of hair follicles can occur together with hair loss.
- The inheritance pattern of keratosis follicularis spinulosa decalvans can differ among families, and a family history is identified in some patients.
- Abnormal keratinization of hair follicles and the resulting inflammation are understood to contribute to the skin and hair symptoms of keratosis follicularis spinulosa decalvans.
- Typical clinical features include follicular keratotic papules on the face and scalp, loss of the eyebrows, eyelashes, or scalp hair, and photosensitivity or eye symptoms in some patients.
- The age at onset and the extent and severity of symptoms may differ among families and individuals, and genetic background and environmental factors may contribute to this variation.
- Symptoms often begin in childhood or adolescence, and skin keratinization and hair loss may persist for a long time or progress gradually.
- Diagnosis is based on the medical history and examination of the skin and hair, with skin biopsy, ophthalmic evaluation, or genetic testing considered as adjuncts when needed.
- Similar follicular keratinization disorders or scarring alopecia may be part of the differential diagnosis, so no single test result should establish the diagnosis without interpretation alongside the clinical features.
- Management may include care of the skin barrier and keratinization symptoms, protection from sunlight and eye symptoms, and regular assessment of hair loss and eye health.
- Treatment focuses on reducing the burden of skin and eye symptoms and hair loss rather than uniformly eliminating the disorder.