An Insulinoma with Arteriovenous Shunt Formation Revealed by Computed Tomography Angiography: A Case Report
Abstract
We herein present the case of a 75-year-old female patient with an insulinoma accompanied by arteriovenous shunt formation. Although conventional contrast-enhanced computed tomography (CT) failed to localize the tumor, the lesion in the pancreatic body was successfully identified using magnetic resonance imaging, endoscopic ultrasound, selective arterial calcium injection testing, angiography, and CT arteriography performed during the selective intra-arterial contrast injection. Angiography revealed a stained nodule with a splenic arteriovenous shunt. CT arteriography further demonstrated the tumor and associated arteriovenous shunt, which were not clearly visualized on conventional contrast-enhanced CT. This case suggests that an arteriovenous shunt may contribute to reduced tumor conspicuity on conventional CT.
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BibTeX
@article{yoshida2026insulinoma,
title = {{An Insulinoma with Arteriovenous Shunt Formation Revealed by Computed Tomography Angiography: A Case Report}},
author = {Ayaka Yoshida and Ryuta Baba and Natsumi Marui and Fumie Kimura and Takaya Kodama and Gentaro Egusa and Gaku Nagano and Haruya Ohno},
journal = {Internal Medicine},
year = {2026},
month = sep,
doi = {10.2169/internalmedicine.7943-26},
url = {https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7943-26/_article},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - An Insulinoma with Arteriovenous Shunt Formation Revealed by Computed Tomography Angiography: A Case Report
AU - Ayaka Yoshida
AU - Ryuta Baba
AU - Natsumi Marui
AU - Fumie Kimura
AU - Takaya Kodama
AU - Gentaro Egusa
AU - Gaku Nagano
AU - Haruya Ohno
PY - 2026
DA - 2026/09/29
JO - Internal Medicine
DO - 10.2169/internalmedicine.7943-26
UR - https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7943-26/_article
AB - We herein present the case of a 75-year-old female patient with an insulinoma accompanied by arteriovenous shunt formation. Although conventional contrast-enhanced computed tomography (CT) failed to localize the tumor, the lesion in the pancreatic body was successfully identified using magnetic resonance imaging, endoscopic ultrasound, selective arterial calcium injection testing, angiography, and CT arteriography performed during the selective intra-arterial contrast injection. Angiography revealed a stained nodule with a splenic arteriovenous shunt. CT arteriography further demonstrated the tumor and associated arteriovenous shunt, which were not clearly visualized on conventional contrast-enhanced CT. This case suggests that an arteriovenous shunt may contribute to reduced tumor conspicuity on conventional CT.
SN - 1349-7235
SN - 0918-2918
ER -