Cytopathological evaluation of potential malignancy of duodenal gastrinoma using aspiration smears from two patients' resected tumors (NET G1, NET G2): A case report

Noda,Hirotaka; Masuda,Kazuyoshi; Kanbara,Masami; Maeda,Hiromi; Kobayashi,Tadao   K.; Yutani,Chikao

doi:10.3892/mco.2020.2030

Cytopathological evaluation of potential malignancy of duodenal gastrinoma using aspiration smears from two patients' resected tumors (NET G1, NET G2): A case report

Authors:
- Hirotaka Noda
- Kazuyoshi Masuda
- Masami Kanbara
- Hiromi Maeda
- Tadao K. Kobayashi
- Chikao Yutani
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Affiliations: Department of Pathology, Amagasaki Chuo Hospital, Amagasaki, Hyogo 661‑0976, Japan, Department of Clinical Laboratory, Amagasaki Chuo Hospital, Amagasaki, Hyogo 661‑0976, Japan, Division of Health Sciences, Cancer Education and Research Center, Osaka University Graduate School of Medicine, Osaka 565‑0871, Japan
Published online on: April 10, 2020 https://doi.org/10.3892/mco.2020.2030
Pages: 592-596

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Abstract

Sporadic gastrin‑producing neuroendocrine tumors (NETs) of the duodenum present with either Zollinger‑Ellison syndrome or unspecific syndromes. Ki‑67 scoring in cytopathology is an alternative approach for establishing the gastrinoma grade. Although the majority of NETs, including gastrinomas, occur in the duodenum, most research regarding the Ki‑67 index is focused on tumors of pancreatic origin. To the best of our knowledge, there is no study on the Ki‑67 index for cytological analysis of duodenal gastrinoma. The current report presents two cases of a 56‑year‑old man and a 66‑year‑old woman with NET G1 and G2 gastrinoma, respectively, arising in the duodenal bulb. The present report focused on the differences in nuclear pleomorphism and Ki‑67 index between these two cases.

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