The treatment of postinflammatory hyperpigmentation due to prurigo pigmentosa using dr. hoon hur’s golden parameter therapy with a high fluence 1064nm q-switched nd: yag laser

Prurigo pigmentosa is a rare cutaneous inflammatory disorder characterized by a sudden onset of pruritic, erythematous papules and plaques that leave a reticulated postinflammatory hyperpig mentation (PIH) when they heal. The PIH due to Prurigo pigmentosa is not successfully treated with antibiotics such as doxycycline and minocycline, and by resolution of ketosis. Generally, treating PIH due to Prurigo pigmentosa with traditional laser therapies including 532nm Nd:YAG laser, 694nm ruby laser and 755nm alexandrite laser can provoke side effects such as purpurae, crusts, PIH, mottled hypopigmentation and scarring. Unfortunately, there is no golden standard for the laser treatment of PIH due to Prurigo pigmentosa yet. Therefore, this study was performed to investigate the efficacy and safety of Dr. Hoon Hur’s Golden Parameter Therapy (GPT) using a high fluence 1064nm Q-switched Nd: YAG laser (QSNL) for treating PIH due to Prurigo pigmentosa. Eleven Korean patients with PIH due to Prurigo pigmentosa were treated with a 1064nm QSNL at a one-week interval for 30 treatment sessions of Dr. Hoon Hur’s GPT. The parameters were a spot size of 7 mm, a fluence of 2.4 J/cm2 and a pulse rate of 10Hz with a slow single pass by a sliding-stacking technique over the PIH due to Prurigo pigmentosa. At the week of the final treatment, all of the 11 patient with PIH due to Prurigo pigmentosa were achieved the complete clearance of pigmented lesions without any side effects such as purpurae, crusts, PIH, mottled hypopigmentation and scarring. There were no recurrences after a follow- up of 6-12 months. We suggest that Dr. Hoon Hur’s GPT using a high fluence 1064nm QSNL is a safe and effective method without side effects and recurrences for treating PIH due to Prurigo pigmentosa.