A 30-year-old man had a markedly hyperkeratotic conical lesion on his sole between the first and second metatarsals. He noted that the lesion, which measured 1.5 x 1.1 cm at the base, was painful only when he walked or stood (his ambulation had been limited for the past nine months following a motor vehicle accident). Topical wart remedies had provided no relief. The patient believed the growth had first appeared as a wart about one year ago, but it had grown tremendously over the past six months. He was worried that it was cancerous.
What is your diagnosis?
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