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[A Small Rectal Neuroendocrine Tumor of Less Than 5mm with Lymph Node Metastasis].
- Source :
-
Gan to kagaku ryoho. Cancer & chemotherapy [Gan To Kagaku Ryoho] 2018 Dec; Vol. 45 (13), pp. 1985-1987. - Publication Year :
- 2018
-
Abstract
- According to the treatment guideline for rectal neuroendocrine tumor(NET), tumor with a diameter ofC10mm should be resected endoscopically, while tumor with a diameter of>10mm should be resected surgically with lymph node dissection. We experienced a case of a rectal NET with a diameter of 5mm with lymph node metastasis. A 69-year-old man underwent colonoscopy for positive fecal occult blood test. The colonoscopy revealed a submucosal tumor(SMT)with a diameter of 5 mm in the lower rectum. An endoscopic mucosal resection(EMR)was performed after SMT was diagnosed as NET by biopsy. Histopathological findings were NET-G1, 4.5×2.5 mm, v(+), ly(+). Then, laparoscopically assisted rectal resection with D2 lymph node dissection was performed. In histopathological examination, no tumor residue was observed in the specimu; however, a regional lymph node metastasis was detected. Risk factors of lymph node metastasis with rectal NET are a diameter of>10 mm, recessed or ulcerated surface, and lymphovascular invasion. However, we have to keep in mind that lymph node metastasis may occur even in small rectal NET with a diameter of ≤10mm.
Details
- Language :
- Japanese
- ISSN :
- 0385-0684
- Volume :
- 45
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Gan to kagaku ryoho. Cancer & chemotherapy
- Publication Type :
- Academic Journal
- Accession number :
- 30692419