Rectal neuroendocrine tumor with extracapsular lymph node metastasis: a case report
| Autor: | Munetoshi Hinata, Soichiro Ishihara, Tetsuo Ushiku, Kazuhito Sasaki, Koji Murono, Hiroyuki Anzai, Hiroaki Nozawa, Akira Sakamoto, Hiroaki Ishii, Shigenobu Emoto, Kazushige Kawai, Yuichiro Yokoyama, Hirofumi Sonoda |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Colorectal cancer Rectum Metastasis Biopsy medicine Humans Lymph node medicine.diagnostic_test business.industry Rectal Neoplasms Gastroenterology General Medicine Middle Aged medicine.disease Prognosis Primary tumor Colorectal surgery Neuroendocrine Tumors Lymphatic system medicine.anatomical_structure Lymphatic Metastasis Lymph Node Excision Female Radiology Lymph Nodes Neoplasm Recurrence Local business |
| Zdroj: | Clinical journal of gastroenterology. 14(5) |
| ISSN: | 1865-7265 |
| Popis: | The presence of extramural tumor deposits without lymph node structure (EX) is an important prognostic factor in patients with colorectal carcinoma. However, there is no English literature on neuroendocrine tumor (NET) with EX. We report a patient with rectal NET with extracapsular metastasis of a regional lymph node that was considered to be EX. A 51-year-old Japanese woman with diabetes was referred to our hospital for further examination of a submucosal tumor in the lower rectum. She was diagnosed as having rectal NET by immunohistochemical analysis of a biopsy, and underwent laparoscopic low anterior resection with lymph node dissection and covering ileostomy. Pathological findings of the resected specimen showed that the primary tumor was NET-G1 without any lymphatic or venous invasion. A single metastatic deposit was found near the capsule of a NET-negative regional lymph node. She has been free from recurrence for nine months without adjuvant treatments. Extracapsular metastasis of NET on a dissected lymph node in our case was considered to correspond to EX as defined for colorectal carcinoma. This rare case suggests that NET can disseminate to form EX in a similar manner to colorectal carcinoma. |
| Databáze: | OpenAIRE |
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