A case of rectal MiNEN demonstrating vascular stalk-like imaging and gross demarcation of tumor components
Mixed neuroendocrine-non-neuroendocrine neoplasms (MiNENs) of the rectum are extremely rare and pose significant diagnostic challenges. We report a 69-year-old man with rectal MiNEN successfully treated with a robot-assisted Hartmann's procedure. Preoperative contrast-enhanced CT revealed a vascular stalk-like structure within the tumor. Gross pathology showed a clear demarcation between adenocarcinoma and small-cell neuroendocrine carcinoma. Robot-assisted surgery facilitated precise dissection in the narrow pelvic cavity and safe distal transection through a transanal approach. This case highlights unique radiological and pathological findings that may aid in the diagnosis and management of rectal MiNEN.
Authors
- Kazuki Kato (ORCID: https://orcid.org/0000-0003-0643-1023)
- Koichiro Sawada (ORCID: https://orcid.org/0000-0001-9221-6420)
- Daisuke Fujimori (ORCID: https://orcid.org/0000-0003-3465-0477)
- Noriyuki Inaki (ORCID: https://orcid.org/0000-0002-4241-5015)
- Masato Hayashi (ORCID: https://orcid.org/0000-0003-2437-056X)
- Masanori Kotake (ORCID: https://orcid.org/0000-0002-4224-7680)
- Munenori Mukai
- Takuo Hara (ORCID: https://orcid.org/0009-0001-0877-6175)
- Hironori Hayashi (ORCID: https://orcid.org/0000-0002-8441-095X)
- Takahiro Yoshimura
- H. Kitabayashi
- Kenichiro Tsukada
- Kaeko Oyama
Institutions
- Kanazawa University (JP)
- Kanazawa Medical University (JP)
- Kouseiren Takaoka Hospital (JP)
Publication Details
- Journal
- Journal of Surgical Case Reports
- Published
- 2025-11-29
- DOI
- https://doi.org/10.1093/jscr/rjaf996
- Primary Topic
- Neuroendocrine Tumor Research Advances
- Type
- article
- Field-Weighted Citation Impact
- 0.00