Colorectal & Perineal

Colorectal & Perineal


Colorectal most often disseminates to the liver and lung and rarely to the skin (,). The incidence
of skin involvement for colorectal cancer is reported as low as 2.3% (). Cutaneous metastases from colorectal cancer are
generally caused by direct tumor extension, dissemination, invasion of the embryonic ligaments, or implantation during surgical resection

(). The massive invasion of rectal cancer to the perineal skin is considered extremely rare,
since the sensation of a perianal lump, altered bowel habits, bleeding or soiling, usually leads to diagnosis prior to
the occurrence of massive invasion to the perineal area (). Patients with perineal skin invasion by rectal cancer present with
symptoms of severe pain, continuous bleeding and distressing discharge,
which significantly affect their quality of life.