Angioblastoma showing aggravation after treatment with long-pulsed Nd:YAG laser (1064 nm).

Angioblastoma usually develops in infancy or early childhood on the neck or upper trunk. It is known to be slowly progressive and benign in nature, but treatment guidelines have not yet been established. Spontaneous regression has been occasionally documented, and treatment with pulsed dye laser, excision, high-dose steroids, and interferon alpha have been successful in individual patients. Our patient experienced partial response to interferon alpha injection, and for further treatment, long-pulsed Nd:YAG laser (1064 nm) treatment was performed. However, unexpectedly, the tumor was rapidly aggravated. We report this occurrence to increase awareness of trauma-induced aggravation phenomena in angioblastoma.