Gastrointestinal cancer skin metastasis

Gastrointestinal carcinoma, colon and rectal cancer is the second most common primary tumor, and it is also the most common visceral tumor that metastasizes to the skin. Most occur in the rectum, accounting for 11% to 19% of skin metastatic cancers in men and 1.3% to 9% in women. Colorectal cancer is usually found before skin metastases. The sites of skin metastasis from the stomach and intestines are usually the abdominal wall, perineum, and umbilicus.

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