Abstract
Purpose
Mixed neuroendocrine-non-neuroendocrine neoplasm (MiNEN) is a rare type of cervical tumor. Its clinicopathological features, lymph node (LN) metastatic patterns and outcomes are still unclear.
Methods
We have analyzed the clinicopathological information of 26 patients with cervical MiNEN.
Results
The median age of onset for cervical MiNEN was 48 years. Macroscopically, polyps and nodules were the main types. The neuroendocrine components included small cell neuroendocrine carcinoma (SCNEC) (14/26 cases), large cell neuroendocrine carcinoma (LCNEC) (10/26 cases), and typical carcinoid (2/26 cases). Non-neuroendocrine components included adenocarcinoma (AC) (12/26, including one case of AC in situ) and squamous cell carcinoma (SC) (10/26) and adeno-squamous cell carcinoma (ASC) (4/26). Of the 16 AC cases, 15 were human papilloma virus (HPV)-associated AC and one was HPV-independent AC. Except for the case of MiNEN with HPV-independent AC, all cases were diffusely and strongly positive for p16 protein. The lympho-vascular space invasion (LVSI) was seen in 17/26 cases, and the components that invade lymphatic vessels were mainly neuroendocrine carcinomas (NECs) (15/17), followed by SC (1/17) and AC (1/17). Ten patients developed LN metastases, including six in combined SCNECs (6/14) and four in combined LCNECs (4/10); the metastatic component was pure NEC in eight cases (8/10) and SC or AC in two cases (2/10).
Conclusions
NEC component is the key factor that determines the clinical behavior and prognosis of cervical MiNEN.
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Acknowledgements
We would like to thank the Natural Science Foundation of Liaoning Province, Shenyang High-level Innovative Talents Program and Liaoning Cancer Hospital and Institute, Dalian University of Technology “Medical-industrial interdisciplinary research fund” for their financial supports. We also will thank BioMed Proofreading® LLC for English language editing.
Funding
This work was supported by grants from the Natural Science Foundation of Liaoning Province (2020-ZLLH-45), Shenyang High-level Innovative Talents Program (RC190447) and Liaoning Cancer Hospital and Institute, Dalian University of Technology “Medical-industrial interdisciplinary research fund” (LD202021).
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H.X. contributed to the scripting of this manuscript. Z.Z. contributed to the immunohistochemical staining, searching for clinical data and obtaining prognostic information. Y.Z. contributed to the overall design and revision of this manuscript.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of the Liaoning Cancer Hospital and Institute (Ethics Committee Approval Document: 20200815YG, 2020.8.19- 2021.8.18).
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Xu, H., Zhao, Z. & Zhu, Y. Clinicopathologic features and lymph node metastasis pattern of the cervical MiNEN. Endocrine 76, 474–483 (2022). https://doi.org/10.1007/s12020-022-02992-2
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DOI: https://doi.org/10.1007/s12020-022-02992-2