A simple and minimally invasive skin biopsy could help diagnose Parkinson ... Each person underwent three 3mm skin punch biopsies taken from the neck, the knee and the ankle.

The nails were bilateral and symmetrical (Figure 1). Punch biopsy of the dystrophic nail plate using 3-mm skin punch was performed. It was driven down through the nail plate to the periosteum.

Traditionally, punch biopsy sites have been sutured, but the benefit of this practice has never been scientifically demonstrated. In this prospective, randomized, method-comparison study ...