A Hyperpigmented Perianal Nodule
- Author(s): Kahn, Steven
- Warso, Michael A.
- Aronson, Iris K.
- et al.
Published Web Locationhttps://doi.org/10.5070/D3195018178
Basal cell carcinoma (BCC) is the most common cutaneous malignancy. Ultraviolet light is an important risk factor for the pathogenesis of BCCs; the vast majority are found in sun-exposed areas. BCCs occurring in the perianal or genital regions are seldom seen. Less than 1% of all BCCs occur at these sites. Etiologic factors other than solar exposure must be taken into account for such cases. We report a rare case of BCC that was initially detected during a routine colonoscopy.