A 53 year old woman presented to the office with complaint of severe bilateral thumb nail pain and the deformity shown (Figure 1). She denied previous trauma to her thumb nails and had no history of previous bacterial or fungal infections of her nails. Based on the curvature of her nails, which increased from proximal to distal, a diagnosis of bilateral thumb pincer nail deformity was made.
Van Duzer, Scott T. and Taras, John S., "Surgical Correction of Severe Bilateral Thumb Pincer-Nail Deformity" (2006). Department of Orthopaedic Surgery Faculty Papers. Paper 7.