Utility of dermatoscopy in the diagnosis of Habit-Tic Nail Deformity

Abstract

To the Editor,The habit-tic deformity, also known as “washboard nails,” is a type of nail dystrophy caused by repetitive microtraumas to the nail matrix. The disorder is classified under the spectrum of nail tic disorders.1Conscious or unconscious rubbing, picking, and pushing back the cu-ticle and proximal nail fold cause a central depression running down the nail plate. Additionally, the ulnar side of the nail may present with hangnails. The entity is usually seen in adults, and the most com-mon location is thumbnails. Unilateral or bilateral involvement can be observed.2 The classical clinical presentation is characterized by a yellowish midline furrow along the long axis of the nail plate, with a series of transverse lines (Figure 1).