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Anal metastasis from rectal adenocarcinoma
Takeshi Nishikawa1, Soichiro Ishihara2, Tetsuo Ushiku3
1Department of Surgical Oncology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. takn-tky@umin.ac.jp.
Clinical Journal of Gastroenterology
|October 4, 2016
Summary
Rectal cancer metastasis to the anus is rare. This case highlights the importance of thorough anal examination during colonoscopy to detect anal metastasis in advanced rectal cancer patients.
Area of Science:
- Gastroenterology
- Surgical Oncology
- Oncology
Background:
- Rectal cancer metastasis to the anus is an uncommon occurrence.
- Advanced rectal cancer can present with diffuse venous invasion, leading to distant metastases.
Observation:
- A 72-year-old woman presented with perianal pain and rectal bleeding.
- Examination revealed an anal tumor, confirmed as moderately differentiated adenocarcinoma, alongside rectal cancer, inguinal lymph node, and liver metastases.
Findings:
- Histopathology confirmed the anal tumor as metastatic rectal cancer.
- The patient underwent surgical resection of the rectal tumor, anal tumor, inguinal lymph node, and liver metastases.
Implications:
- This case underscores the importance of thorough anal examination during colonoscopy or digital rectal exams for detecting anal metastasis in rectal cancer patients.
- Prompt diagnosis and surgical intervention are critical for managing rare metastatic patterns of rectal cancer.
