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Diagnostic accuracy of apparent diffusion coefficient to differentiate intrapancreatic accessory spleen from pancreatic neuroendocrine tumors

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World Journal of Gastrointestinal Oncology 2023年第6期15卷 1051-1061页

作者： Shuai Ren Kai Guo Yuan Li Ying-Ying Cao Zhong-Qiu Wang Ying Tian Department of Radiology Jiangsu Province Hospital of Chinese MedicineAffiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina

BACKGROUND Intrapancreatic accessory spleen(IPAS)shares similar imaging findings with hypervascular pancreatic neuroendocrine tumors(PNETs),which may lead to unnecessary *** To investigate and compare the diagnostic performance of absolute apparent diffusion coefficient(ADC)and normalized ADC(lesion-to-spleen ADC ratios)in the differential diagnosis of IPAS from *** A retrospective study consisting of 29 patients(16 PNET patients vs 13 IPAS patients)who underwent preoperative contrast-enhanced magnetic resonance imaging together with diffusion-weighted imaging/ADC maps between January 2017 and July 2020 was *** independent reviewers measured ADC on all lesions and spleens,and normalized ADC was calculated for further *** receiver operating characteristics analysis was carried out for evaluating the diagnostic performance of both absolute ADC and normalized ADC values in the differential diagnosis between IPAS and PNETs by clarifying sensitivity,specificity,and ***-reader reliability for the two methods was *** IPAS had a significantly lower absolute ADC(0.931±0.773×10^(-3)mm^(2)/s vs 1.254±0.219×10^(-3)mm^(2)/s)and normalized ADC value(1.154±0.167 vs 1.591±0.364)compared to PNET.A cutoff value of 1.046×10^(-3)mm^(2)/s for absolute ADC was associated with 81.25%sensitivity,100%specificity,and 89.66%accuracy with an area under the curve of 0.94(95%confidence interval:0.8536-1.000)for the differential diagnosis of IPAS from ***,a cutoff value of 1.342 for normalized ADC was associated with 81.25%sensitivity,92.31%specificity,and 86.21%accuracy with an area under the curve of 0.91(95%confidence interval:0.8080-1.000)for the differential diagnosis of IPAS from *** methods showed excellent inter-reader reliability with intraclass correlation coefficients for absolute ADC and ADC ratio being 0.968 and 0.976,*** Both absolute ADC and normalized ADC values can facilitate the di

关键词： Pancreas Neuroendocrine tumors accessory spleen Diffusion-weighted imaging Diagnostic performance

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Intrapancreatic accessory spleen:A case report and review of the literature

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World Journal of Gastroenterology 2009年第9期15卷 1141-1143页

作者： Wei Guo Wei Han Jun Liu Lan Jin Jian-She Li Zhong-Tao Zhang Yu Wang Department of General Surgery Beijing Friendship Hospital Capital Medical University Beijing 100050 China

Here,we report a case of intrapancreatic accessory spleen confirmed by pathologic diagnosis and discuss its differential diagnosis and surgical management with a review of the literature.

关键词： accessory spleen Pancreas Differential diagnosis Surgical management Congenital defect

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Enlarged accessory spleen presenting stomach submucosal tumor

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World Journal of Gastroenterology 2007年第11期13卷 1752-1754页

作者： Shunzen Chin Hajime Isomoto Yohei Mizuta Chun-Yang Wen Saburo Shikuwa Shigeru Kohno Second Department of Internal Medicine Nagasaki University School of Medicine 1-7-1 Sakamoto Nagasaki Japan Beihua University 3999 Huashan Road Jilin City

A 62-year-old man presented with upper abdominal discomfort underwent upper gastrointestinal endoscopy. Gastroscopy and endoscopic ultrasonography revealed a submucosal tumor (SMT) with homogenous echogenicity originated from extragastric organs. An abdominal contrast-enhanced computed tomography (CT) showed that the well-marginated ovoid mass, approximately 6 cm in diameter, enhanced homogenously to a similar degree as splenic parenchyma. 99mTechnetium sulfur colloid scintigraphy revealed the splenic nature of the mass. A diagnosis of accessory spleen mimicking gastric SMT was made. Subsequent follow-up was uneventful without performing splenectomy.

关键词： accessory spleen ^99mTechnetium sulfur colloid scintigraphy Computed tomography Gastric submucosal tumor

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