Dear Editor,rnWe present here a rare case of rectal adenocarcinoma metastasized to scrotum skin that was detected in a 36-year-old man.In addition,we have reviewed the Chinese and English literature for reports of internal malignancy secondary to scrotum skin.To our best knowledge,there are forty cases reported in literature.rnRectal adenocarcinoma mainly metastasizes to the lymph nodes,liver,lung and bone.1 Cutaneous metastasis of rectal carcinoma is rare,which mostly occur in the skin of the abdomen and crissum.Scrotum skin is rarely involved.Cutaneous metastasis is generally an indication of widespread disease.2