[Treatment of pilonidal cyst with Nd-YAG laser].

A 23 year-old woman with a nonsupporative pilonidal cyst was successfully treated causally with Nd-YAG laser, and without any recidivate after 9 months follow-up. The mechanism is presumed to be that YAG-laser has a wave-length of 1064 nm. Consequently, the wave penetration through the skin is deeper than most other lasers before the energy is absorbed in melanin and oxyhaemoglobin, so the contents of the cyst can be reached and destroyed. The treatment could be a very attractive alternative to open surgery.