Seehafer J R, Muller S A, Dicken C H, Masson J K
Arch Dermatol. 1979 Oct;115(10):1222-3.
A 51-year-old woman had had bilateral verrucous carcinoma of the feet for ten years. The tumors had been treated many times as extensive verruca vulgaris before a biopsy was performed and the true neoplastic nature of the lesion recognized. This case illustrates the necessity of performing biopsies on atypical or frequently unresponsive verrucous tumors.