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Baba H, Yamada Y, Tada K, Kuboyama Y, Fukuzawa K, Iwaki K, Motomura M, Takaji R, Shimada R, Takaki H, Asayama Y. Pancreatic mixed acinar-neuroendocrine carcinoma with intraductal growth: A case report with radiologic-pathologic correlations. Radiol Case Rep 2023; 18:4422-4430. [PMID: 37929047 PMCID: PMC10624768 DOI: 10.1016/j.radcr.2023.09.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 11/07/2023] Open
Abstract
Pancreatic mixed acinar-neuroendocrine carcinomas are rare malignant tumors of the pancreas. They are composed histologically of both acinar and neuroendocrine cells. The pancreatic duct is known to be an important site of tumor growth for acinar cell carcinomas, neuroendocrine tumors, and intraductal tubulopapillary neoplasms. To the best of our knowledge, there has been only 1 report of a mixed acinar-neuroendocrine carcinoma growing into the pancreatic duct and no reports detailing imaging findings with this tumor. We here report a 69-year-old man who presented with worsening glycemic control. Multiphase contrast-enhanced computed tomography and magnetic resonance imaging revealed a well-circumscribed mass with poor contrast enhancement in the pancreatic tail region of the pancreatic duct. The intraductal mass showed diffusion restriction on magnetic resonance imaging. These imaging findings are consistent with the expansive, smooth-surfaced polypoid tumor of low vascularity and high cellularity that was diagnosed pathologically. Mixed acinar-neuroendocrine carcinomas should be included in the differential diagnosis of intraductal tumors of the pancreas with poor contrast enhancement and diffusion restriction.
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Affiliation(s)
- Hiroshi Baba
- Department of Radiology, Oita Red Cross Hospital, Chiyo-machi, Oita, Japan
| | - Yasunari Yamada
- Department of Radiology, Oita Red Cross Hospital, Chiyo-machi, Oita, Japan
| | - Kazuhiro Tada
- Department of Surgery, Oita Red Cross Hospital, Chiyo-machi, Oita , Japan
| | - Yusuke Kuboyama
- Department of Pathology, Oita Red Cross Hospital, Chiyo-machi, Oita, Japan
| | - Kengo Fukuzawa
- Department of Surgery, Oita Red Cross Hospital, Chiyo-machi, Oita , Japan
| | - Kentaro Iwaki
- Department of Surgery, Oita Red Cross Hospital, Chiyo-machi, Oita , Japan
| | - Mitsuteru Motomura
- Hepato-Biliary-Pancreatic Internal Medicine, Oita Red Cross Hospital, Chiyo-machi, Oita, 870-0033, Japan
| | - Ryo Takaji
- Department of Radiology, Oita University Faculty of Medicine, Yufu, Oita, 879-5593, Japan
| | - Ryuichi Shimada
- Department of Radiology, Oita University Faculty of Medicine, Yufu, Oita, 879-5593, Japan
| | - Hajime Takaki
- Department of Radiology, Oita Red Cross Hospital, Chiyo-machi, Oita, Japan
| | - Yoshiki Asayama
- Department of Radiology, Oita University Faculty of Medicine, Yufu, Oita, 879-5593, Japan
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Horiguchi R, Ogawa H, Nagai N, Takehara Y, Naganawa S, Yokoyama Y, Shimoyama Y. A case of intraductal tubulopapillary neoplasm of the pancreas originating from the branch duct: cast in the mold sign. NAGOYA JOURNAL OF MEDICAL SCIENCE 2021; 83:869-875. [PMID: 34916729 PMCID: PMC8648518 DOI: 10.18999/nagjms.83.4.869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/19/2021] [Indexed: 11/06/2022]
Abstract
A 59-year-old man with jaundice and lower common bile duct stenosis was referred to our institution for diagnosis and treatment. Computed tomography and magnetic resonance imaging showed a well-circumscribed smoothly marginated solid mass lesion in the pancreatic head. He underwent pyloric preserving pancreatoduodenectomy. Histopathological specimen revealed that the mass was located in the dilated branch duct of the pancreatic head, and an intraductal tubulopapillary neoplasm originating from the branch pancreatic duct was diagnosed. On magnetic resonance cholangiopancreatography, the mass within the dilated duct branch in the pancreatic head was similar to a "cast in the mold" image, which we retrospectively deemed, might be reflecting the nature of this tumor.
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Affiliation(s)
- Ryota Horiguchi
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroshi Ogawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Naoya Nagai
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
,Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yukihiro Yokoyama
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshie Shimoyama
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan
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