Treatment of Trichostasis Spinulosa in Skin Phototypes III, IV, and V With an 800-nm Pulsed Diode Laser

The study investigated the effectiveness of an 800-nm pulsed diode laser in treating Trichostasis Spinulosa (TS) in 13 subjects with skin phototypes III, IV, and V. The subjects received two treatments at 4-week intervals, with fluences ranging from 24 to 40 J/cm² and pulse widths of 12 to 20 ms. Results showed complete clearing of lesions for 8 to 12 weeks and a greater than 50% reduction in dark-plug appearance in half of the subjects 20 weeks post-treatment. No pigmentary changes or scarring were observed, indicating that the pulsed diode laser was a safe and effective long-term treatment for TS in dark-skinned individuals.