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Lymphoepithelial cyst of uncinated process of the pancreas associated with chronic cholecystitis: Case report and review of literature. Ann Med Surg (Lond) 2022; 80:104117. [PMID: 36045768 PMCID: PMC9422077 DOI: 10.1016/j.amsu.2022.104117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 12/01/2022] Open
Abstract
Introduction Lymphoepithelial cysts (LECs) are extremely uncommon disorders with pancreatic affection. It is predominant in middle-aged men and may be located in any portion of the pancreas. Differential diagnosis with malignant conditions is difficult. Case presentation A 53-year-old woman with abdominal pain and cystic lesion involving pancreas managed thorugh laparoscopic excision and colecistectomy due to chronic cholecystitis. Discussion and conclusion LECs are a type of true cysts that may occur in any portion of the pancreas, most common sites are the tail and body, with unclear pathogenesis. Accuracy in diagnosis with proper image investigation is necessary to separate surgical cases from conservatively managed. Lymphoepithelial cysts are uncommon conditions with pancreatic affection. Pancreatic lymphoepithelial cysts are benign cysts with higher predominance in middle-aged men (4:1). It may affect any portion of the pancreas, however the tail or body are the most common sets. Its diagnosis it is only possible through histopathological analysis and neoplasms must be included as differential diagnosis.
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Murokawa T, Okabayashi T, Oishi K, Sui K, Tabuchi M, Iwata J. Exophytic pancreatic lymphoepithelial cyst incidentally detected in a differentiated thyroid cancer patient on whole-body I-131 scan: a case report. Surg Case Rep 2022; 8:34. [PMID: 35211824 PMCID: PMC8873321 DOI: 10.1186/s40792-022-01389-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/17/2022] [Indexed: 11/10/2022] Open
Abstract
Background Radioiodine (I-131) whole-body scintigraphy (WBS) is a useful modality for identifying functionally preserved thyroid tissue and metastases from differentiated thyroid cancer (DTC); however, the specificity of I-131 uptake is limited, and its accumulation in the pancreas has not been well described. Case presentation A 70-year-old male patient with DTC who had previously undergone total thyroidectomy (pT3N1bM0 Stage IV) received radioiodine treatment at our facility. After treatment, an I-131 WBS revealed abnormal I-131 uptake in the head of the pancreas. Computed tomography identified a round hypodense mass (10 × 20 mm) adjacent to the pancreas head that was impervious to fluorodeoxyglucose (18F-FDG) during subsequent 18F-FDG-positron emission tomography. A diagnosis of pancreatic metastasis from the DTC could not be excluded; therefore, local resection was performed for diagnostic certainty and treatment. Histopathology confirmed the mass to be an exophytic lymphoepithelial cyst (LEC) of the pancreas. The patient also had a transient pancreatic leak which spontaneously resolved after surgery, and he was discharged from the hospital on postoperative day 8. Conclusion To the best of our knowledge, this is the first reported case of an exophytic pancreatic LEC producing a false-positive result during I-131 WBS. Knowledge of all potential I-131 false-positive findings may help improve the management of patients with DTC and circumvent misdiagnoses.
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Affiliation(s)
- Takahiro Murokawa
- Department of Gastroenterological Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan
| | - Takehiro Okabayashi
- Department of Gastroenterological Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan.
| | - Kazuyuki Oishi
- Department of Gastroenterological Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan
| | - Kenta Sui
- Department of Gastroenterological Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan
| | - Motoyasu Tabuchi
- Department of Gastroenterological Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan
| | - Jun Iwata
- Department of Diagnostic Pathology, Kochi Health Sciences Center, 2125-1 Ike, Kochi-City, Kochi, 781-8555, Japan
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Wang S, Guo J, Liu X, Ge N, Wang G, Hu J, Zhang K, Sun S. Evaluation of a novel radial echoendosonoscope with a piezoelectric-composite transducer: An open-label, multicenter, randomized, parallel-group, noninferiority clinical trial. Endosc Ultrasound 2021; 10:431-439. [PMID: 34975041 PMCID: PMC8785674 DOI: 10.4103/eus-d-21-00100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND AND OBJECTIVES EUS is widely used in the clinical practice. This study aimed to evaluate the efficacy of a novel echoendoscope regarding image quality, maneuverability, stability of the entire machine system, and safety. SETTING AND DESIGN We conducted this open-label, multicenter, randomized, parallel-group, noninferiority clinical trial in three tertiary hospitals between November 2018 and April 2019. SUBJECTS AND METHODS One hundred and thirty patients were included. The stratified segment randomization method was employed. Sixty-five patients in the test group received an EUS examination using the new material radial echoendoscope, and 65 patients in the control group received an EUS examination using the existing endoscope. We recorded the image quality, maneuverability, stability of the entire machine system, and safety. For the main outcome, comprehensive image quality, the groups were compared with the noninferiority test, using the confidence interval method and 10% as the noninferiority threshold. The Pearson Chi-square test was used to compare the incidence of adverse events between the groups. RESULTS Sixty-five patients in the test group and 63 patients in the control group were analyzed. Two patients in control group did not complete an EUS examination due to machine problems. There were no significant differences in image quality, maneuverability of the echoendoscope, stability of the entire machine system, and safety between the groups. CONCLUSIONS This new material radial echoendoscope showed good capabilities for image quality, maneuverability, stability of the entire machine system, and safety. Our data suggest that the new echoendoscope may provide an additional option for endoscopic physicians.
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Affiliation(s)
- Sheng Wang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Jintao Guo
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Xiang Liu
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Nan Ge
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Guoxin Wang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Jinlong Hu
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Kai Zhang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Siyu Sun
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
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Iguchi T, Shimizu A, Kubota K, Notake T, Sugenoya S, Hosoda K, Yasukawa K, Hayashi H, Kobayashi R, Soejima Y. Lymphoepithelial cyst mimicking pancreatic cancer: a case report and literature review. Surg Case Rep 2021; 7:108. [PMID: 33914178 PMCID: PMC8085173 DOI: 10.1186/s40792-021-01191-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 04/25/2021] [Indexed: 11/30/2022] Open
Abstract
Background Pancreatic lymphoepithelial cyst (LEC) is a rare nonmalignant cyst consisting of a benign collection of keratinizing squamous epithelial cells with lymphoid tissue. Diagnosing LEC preoperatively is considered difficult because of its non-specific clinical features; therefore, LEC is generally treated the same as a malignant tumor. Case presentation Our case was a 65-year-old man who underwent pancreatoduodenectomy 3 years previously for carcinoma arising from the ampulla of Vater. A pancreatic mass in the remnant pancreatic tail was detected through follow-up abdominal contrast-enhanced computed tomography (CT). This revealed two adjacent ring-enhanced masses that had been in tight contact with the left diaphragm and were enlarged. The tumors had high signal intensity in diffusion-weighted images of magnetic resonance imaging, and fluorodeoxyglucose-positron emission tomography (FDG-PET) showed abnormal uptake (standardized uptake value maximum: 17.4). Therefore, we conducted a partial resection of the remnant pancreas with concomitant resection of the left diaphragm. Microscopically, one of the tumors revealed rare fragments of apparently benign squamous epithelium on a background of keratinous debris, cyst contents, and scattered lymphocytes, and the adjacent mass revealed infiltrated neutrophils. The histopathological diagnosis was an LEC with chronic abscess. The patient recovered uneventfully and was discharged on postoperative day 10. Conclusions We reported a rare case of LEC with chronic abscess that was positively visualized on FDG-PET. When a pancreatic malignancy cannot be excluded, surgical resection is considered inevitable.
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Affiliation(s)
- Takuya Iguchi
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Akira Shimizu
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.
| | - Koji Kubota
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Tsuyoshi Notake
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Shinsuke Sugenoya
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Kiyotaka Hosoda
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Koya Yasukawa
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Hikaru Hayashi
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Ryoichiro Kobayashi
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Yuji Soejima
- Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
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Kayahara M, Onishi I, Makita N, Kano S, Munemoto M, Yagi Y, Minami M, Orita N, Komura T, Kurose N. Pancreatic acinar cell carcinoma with extension into the main pancreatic duct: a case report. Surg Case Rep 2021; 7:90. [PMID: 33847839 PMCID: PMC8044282 DOI: 10.1186/s40792-021-01172-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 04/02/2021] [Indexed: 11/13/2022] Open
Abstract
Background Pancreatic acinar cell carcinoma (PACC) is a rare exocrine malignant tumor. Its widespread intraductal extension into the main pancreatic duct (MPD) is also rare. Case presentation We report the case of a 71-year-old man with PACC with MPD extension. The patient was assessed with laboratory and radiographic investigations that facilitated a preoperative diagnosis. Endoscopic ultrasonography (EUS) and dynamic thin-slice multi-detector row computed tomography (MDCT) were useful for determining the resection line of the pancreas. EUS-guided fine needle aspiration (EUS-FNA) was also helpful in determining the tumor biology and treatment strategy. Distal pancreatectomy was performed. The MPD was occupied by the tumor 35 mm downstream and 5 mm upstream. Histopathologically, the pancreatic tail tumor extended continuously into the MPD. The tumor was solid with cells showing eosinophilic and granular cytoplasm, indicating the diagnosis of PACC. This is an interesting case of PACC with intraductal extension into the MPD. We discuss the possible mechanisms of tumor extension in this rare case together with a review of the literature. Conclusions We describe a rare pancreatic acinar cell carcinoma that could be adequately treated using preoperative precise imaging and histopathological evaluations. When an intraductal tumor extension in the MPD is encountered, the diagnosis of a rare pancreatic tumor should be considered, as in our case.
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Affiliation(s)
- Masato Kayahara
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan.
| | - Ichiro Onishi
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Naoki Makita
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Shunsuke Kano
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Masayoshi Munemoto
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Yasumichi Yagi
- Department of Surgery, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Makiko Minami
- Department of Radiology, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Noriaki Orita
- Department of Gastroenterology, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Takuya Komura
- Department of Gastroenterology, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
| | - Nozomu Kurose
- Department of Pathology, NHO Kanazawa Medical Center, 1-1 Shimoishibikicho, Kanazawa, Ishikawa, 920-8650, Japan
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