Uncommon presentation of pigmented paraungual basal cell carcinoma on the first toe treated with total excision

Basal cell carcinomas (BCCs) are the most common types of skin neoplasm. The finger, toe, and nail unit are uncommon and rare locations of BCC. Only a few patients with foot BCC have been reported, and ungual BCC is even less frequent. We present a patient with a BCC on the left first toe. Clinically, it appeared as a brown-colored plaque with an irregular border on the nail fold and dorsum of the left thumb. Histopathological findings were consistent with the pigmented type of BCC. Surgical approach with subsequent full thickness mesh graft led to a complete remission. Follow-up at 10 months revealed a functionally and cosmetically acceptable outcome. The clinical presentation of nail unit BCC is variable, and nonspecific manifestations occur more frequently. Our case stated the necessity of histopathologic examination in ulcerous lesions resistant to topical treatment.