Faun tail: a rare cutaneous sign of spinal dysraphism.

Faun tail is a triangle-shaped hypertrichosis of the lumbosacral region. It is a rare condition and it can be a cutaneous marker of underlying spinal cord anomaly. We report on a 17-year-old female patient with hypertrichosis on the lumbosacral area since birth that was later diagnosed with tethered cord in magnetic resonance imaging.