Heberden's nodes' nails.

Heberden's nodes lie close to the matrix of the nails and may impinge on them causing nail changes. This occurs particularly when the nodes become inflamed, cystic or grow distally from the joint. The affected nail often shows a ridge that delimits the area where the disturbance occurs. The surface of the nail distal to the lesion on the nail matrix usually becomes concave. These changes may regress spontaneously, after antiinflammatory treatment or not at all. Depigmentation of the affected area of the nail may remain as a sequela. We illustrate the various modalities of Heberden's nodes' nails with 4 case reports.