Perianal cutaneous metastases from colorectal adenocarcinoma.

The appearance of cutaneous metastases in the perianal region from adenocarcinoma of colon and rectum is an uncommon feature, and its presence usually implies a worse prognosis as a disseminated disease. Occasionally, they present with no evidence of visceral involvement, therefore their diagnosis and treatment can significantly modify the course of the disease. We present 3 patients with perianal implants of colorectal cancer treated surgically with good long-term results, emphasizing that in one of them the implant was discovered before the primary tumor.