A 62-year-old white man presented with a nodule on the dorsum of his right foot (Figure 1). The nodule had gradually enlarged over the past 6 months. As far as the patient could remember, it had arisen from normal skin. The patient had no pain or any other symptoms except for a slight feeling of pressure when wearing footwear. His medical history was unremarkable, and he specifically denied a history of cancer, gout, or rheumatoid arthritis. The nodule, which measured approximately 8 mm in diameter, was almost symmetrically round and dome shaped. It was skin colored, with a grayish darkening toward the center, relatively sharply circumscribed, and surrounded by a diffuse hyperpigmentation. Its surface appeared smooth, and it was firm and movable over the adjacent subcutaneous tissue. Skin examination did not reveal other abnormalities. There were no palpable lymph nodes. The results of dermatoscopy were nonspecific. The nodule was surgically removed and examined microscopically (Figure 2 and Figure 3).
Braun-Falco M, Hein R, Ring J. A Painless Nodule on the Dorsum of the Foot. Arch Dermatol. 2002;138(8):1091-1096. doi:10.1001/archderm.138.8.1091