Dissecting cellulitis of the scalp successfully treated with ALA-PDT: Case report.

A case of recalcitrant dissecting cellulitis of the scalp (DCS) in a 23-year-old male patient was treated with 4 times of topical ALA-PDT at intervals of 10-15 days. The patient responded well without any unbearable adverse effects and presented satisfactory effects. Before applying this therapy, the patient and his doctors had tried other methods, specifically glucocorticoids, intradermal injection, and even surgical treatment, but none of them had presented satisfactory effects. This suggests that topical ALA-PDT could be an effective and safe alternative for DCS patients who are refractory to other standard therapies.