Systemic Lupus Erythematosus Presenting as Alopecia Areata.

Alopecia areata is an inflammatory, non-scarring hair loss associated with autoimmune conditions. It is more commonly seen with thyroid disorders and vitiligo, but alopecia areata has also been linked to diabetes, psoriasis, rheumatoid arthritis, and systemic lupus erythematosus. Indeed, individuals with alopecia areata have an increased risk of developing systemic lupus erythematosus. A 36-year-old woman presented with hair loss characteristic of alopecia areata. After intralesional injections with triamcinolone acetonide, the areas of hair loss exhibited near complete hair regrowth. Laboratory examination and additional history were suggestive of systemic lupus erythematosus. She was referred to a rheumatologist who confirmed the diagnosis. Awareness of the comorbidities associated with alopecia areata can uncover other autoimmune conditions, such as thyroid disorders and systemic lupus erythematosus. The diagnosis of a new-onset alopecia areata may prompt a deeper investigation of potentially associated conditions.