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Pancreatic Neoplasms: HELP
Articles by Shoji Tokunaga
Based on 6 articles published since 2010
(Why 6 articles?)

Between 2010 and 2020, Shoji Tokunaga wrote the following 6 articles about Pancreatic Neoplasms.
+ Citations + Abstracts
1 Article S100P in Duodenal Fluid Is a Useful Diagnostic Marker for Pancreatic Ductal Adenocarcinoma. 2017

Matsunaga, Taketo / Ohtsuka, Takao / Asano, Koichi / Kimura, Hideyo / Ohuchida, Kenoki / Kitada, Hidehisa / Ideno, Noboru / Mori, Yasuhisa / Tokunaga, Shoji / Oda, Yoshinao / Guha, Sushovan / Raimondo, Massimo / Nakamura, Masafumi / Tanaka, Masao. ·From the Departments of *Surgery and Oncology and †Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University; ‡Medical Information Center, Kyushu University Hospital; and §Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; ∥Division of Gastroenterology, Hepatology, and Nutrition, Department of Internal Medicine, The University of Texas Medical School at Houston, TX; and ¶Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL. ·Pancreas · Pubmed #28984789.

ABSTRACT: OBJECTIVES: The development of an effective screening method for pancreatic ductal adenocarcinoma (PDAC) is of paramount importance. This study assessed the diagnostic utility in pancreatic diseases of duodenal markers during upper gastrointestinal endoscopy (GIE) or endoscopic ultrasonography. METHODS: This study prospectively enrolled 299 consecutive participants, including 94 patients with PDACs, 144 patients with other pancreatic diseases, and 61 normal individuals as control subjects. All subjects underwent upper GIE or endoscopic ultrasonography either at Kyushu University Hospital (Fukuoka, Japan) or the Mayo Clinic (Jacksonville, Fla) from October 2011 to July 2014. Duodenal fluid (DF) was collected without secretin stimulation and of carcinoembryonic antigen and S100 calcium-binding protein P (S100P) concentrations were measured. RESULTS: Concentrations of S100P in DF were significantly higher in patients with PDAC and chronic pancreatitis than in control subjects (P < 0.01). A logistic regression model that included age found that the sensitivity and specificity of S100P concentration in diagnosing stages 0/IA/IB/IIA PDAC were 85% and 77%, respectively, with an area under the receiver operating characteristic curve of 0.82. Carcinoembryonic antigen concentrations in DF of patients with pancreatic disease did not differ significantly from control subjects. CONCLUSIONS: Analysis of S100P concentration in DF, in combination with routine screening upper GIE, may facilitate the detection of PDAC.

2 Article Predictive Factors for the Metachronous Development of High-risk Lesions in the Remnant Pancreas After Partial Pancreatectomy for Intraductal Papillary Mucinous Neoplasm. 2016

Miyasaka, Yoshihiro / Ohtsuka, Takao / Tamura, Koji / Mori, Yasuhisa / Shindo, Koji / Yamada, Daisuke / Takahata, Shunichi / Ishigami, Kousei / Ito, Tetsuhide / Tokunaga, Shoji / Oda, Yoshinao / Mizumoto, Kazuhiro / Nakamura, Masafumi / Tanaka, Masao. ·*Departments of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan†Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan‡Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan§Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan||The Medical Information Center and Cancer Center, Kyushu University Hospital, Fukuoka, Japan. ·Ann Surg · Pubmed #26334637.

ABSTRACT: OBJECTIVE: To identify factors predicting the development of high-risk lesions in the remnant pancreas after surgery for intraductal papillary mucinous neoplasm (IPMN). BACKGROUND: IPMN has unique features, including multifocality, adenoma-carcinoma sequence, and the development of distinct pancreatic ductal adenocarcinoma (PDAC) in the same pancreas. Careful attention should, therefore, be paid to the metachronous occurrence of high-risk lesions, including high-grade dysplasia or invasive carcinoma (HGD/INV) of IPMN and concomitant PDAC in the remnant pancreas after partial pancreatectomy for IPMN. METHODS: Clinicopathologic and surveillance data for 195 patients who underwent partial pancreatectomy for IPMN were reviewed retrospectively. RESULTS: Thirteen patients exhibited metachronous development of high-risk lesions including 6 HGD/INV and 7 concomitant PDACs in the remnant pancreas. The 5- and 10-year cumulative incidences of metachronous high-risk lesions in the remnant pancreas were 7.8% and 11.8%, respectively. Twelve of 13 patients had high-risk lesions at the time of initial surgery, and 10 of the 13 IPMNs were located in the distal pancreas. The IPMN subtypes initially resected were gastric in 6 patients, intestinal in 5, and pancreatobililary in the remaining 2. Univariate and multiple regression analyses identified pathologic results of HGD/INV and IPMN located in the distal pancreas as independent predictive factors for metachronous HGD/INV of IPMN, and the pancreatobiliary subtype of IPMN and presence of concomitant PDAC for metachronous PDAC. CONCLUSIONS: Patients undergoing partial pancreatectomy for IPMN are at high risk of developing lesions requiring surgery in the remnant pancreas, and close, long-term surveillance should be considered in these patients.

3 Article Podoplanin expression in the cyst wall correlates with the progression of intraductal papillary mucinous neoplasm. 2014

Shindo, Koji / Aishima, Shinichi / Ohuchida, Kenoki / Fujino, Minoru / Mizuuchi, Yusuke / Hattori, Masami / Ohtsuka, Takao / Tokunaga, Shoji / Mizumoto, Kazuhiro / Tanaka, Masao / Oda, Yoshinao. ·Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan. ·Virchows Arch · Pubmed #24990300.

ABSTRACT: A thickened, enhanced cyst wall on imaging examinations is one of the "worrisome features" described in the consensus guidelines for management of intraductal papillary mucinous neoplasm of the pancreas (IPMN). Podoplanin (PDPN) expression by cancer-associated fibroblasts is known to be an indicator of poor prognosis in some types of cancer. We performed immunohistochemical staining for alpha-smooth muscle actin (α-SMA) in IPMN lesions and determined the pathological wall thickness by measuring the thinnest and thickest α-SMA-positive parts of the wall of the largest cyst in each case, and the mean of these two values was recorded as the wall thickness. The thickness of the pathological wall increased with progression from IPMN with low-grade dysplasia to IPMN with an invasive carcinoma. The pathological wall was thicker in IPMN with main duct involvement, nongastric-type IPMN, and IPMN with mural nodules. We also stained for PDPN and assessed the thickness of cyst wall staining as for α-SMA. The thickness of the PDPN-positive cyst wall varied in a pattern similar to the thickness of the α-SMA-positive pathological cyst wall. PDPN-positive stromal fibroblasts in the invasive component of IPMN-IC were evaluated as a ratio to α-SMA-positive fibroblasts. A high ratio (>50 %) of PDPN-positive stromal fibroblasts was a predictor of poor outcome. PDPN expression in the cyst wall correlates with the progression of IPMN. PDPN may be a significant prognostic marker of IPMN-IC.

4 Article MAL2 expression predicts distant metastasis and short survival in pancreatic cancer. 2013

Eguchi, Daiki / Ohuchida, Kenoki / Kozono, Shingo / Ikenaga, Naoki / Shindo, Koji / Cui, Lin / Fujiwara, Kenji / Akagawa, Shin / Ohtsuka, Takao / Takahata, Shunichi / Tokunaga, Shoji / Mizumoto, Kazuhiro / Tanaka, Masao. ·Department of Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. ·Surgery · Pubmed #23876361.

ABSTRACT: BACKGROUND: Pancreatic cancer is associated with a devastating prognosis, partially because of its aggressive metastatic ability. Identification of prognostic markers of metastasis would be useful in the clinical management of postoperative patients with pancreatic cancer. Mal, T-cell differentiation protein 2 (MAL2) has been identified as a molecule predictive of metastases; the clinical relevance of MAL2 in pancreatic cancer is unknown. METHODS: Orthotopic human pancreatic cancer xenografts from the pancreatic cancer cell line SUIT-2 were established in nude mice. Only liver metastasis was harvested and cultured. These metastatic cycles were repeated 5 times to establish a highly metastatic cell line, termed metastatic SUIT-2 (MS). We investigated proliferation and motility of MS cells compared with those of the parent SUIT-2. Microarray analysis was performed to investigate differences in gene expression. We also performed immunohistochemical analysis of 89 formalin-fixed, paraffin-embedded human pancreatic cancer tissue samples to investigate the clinical significance of MAL2 expression. RESULTS: MS cells showed a greater metastatic rate after orthotopic implantation than parental SUIT-2. MS cells had increased motility but decreased proliferation compared with parental SUIT-2. Microarray analyses showed that 26 genes were significantly upregulated (>10-fold) in MS cells compared with parental SUIT-2, particularly MAL2 expression. Immunohistochemical analysis showed that high expression of MAL2 was associated with a lesser survival of postoperative patients (P = .03) and a high rate of distant metastasis (P = .008). CONCLUSION: We characterized a newly established pancreatic cancer cell line with highly metastatic potential. MAL2 is a promising predictive marker for distant metastasis and short survival in patients with resected pancreatic cancer.

5 Article Intraductal papillary mucinous neoplasms of the pancreas with distinct pancreatic ductal adenocarcinomas are frequently of gastric subtype. 2013

Ideno, Noboru / Ohtsuka, Takao / Kono, Hiroshi / Fujiwara, Kenji / Oda, Yasunori / Aishima, Shinichi / Ito, Tetsuhide / Ishigami, Kousei / Tokunaga, Shoji / Ohuchida, Kenoki / Takahata, Shunichi / Nakamura, Masafumi / Mizumoto, Kazuhiro / Tanaka, Masao. ·Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. ·Ann Surg · Pubmed #23532108.

ABSTRACT: OBJECTIVE: To identify a high-risk group of patients with pancreatic ductal adenocarcinoma (PDAC), independently arising in the pancreas with intraductal papillary mucinous neoplasm (IPMN), using histopathologic subtypes. BACKGROUND: Pathologic features of IPMN with distinct PDAC, including histopathologic subtypes of IPMN and PDAC phenotypes, have not been well characterized. Mucin expression patterns and the mutational status of GNAS and KRAS are useful to explore the relationship between these 2 lesion types. METHODS: Clinicopathologic data of 179 resected IPMNs and 180 resected PDACs without IPMNs as a control group were reviewed. IPMNs were classified into 4 grades (low-grade, intermediate-grade, high-grade dysplasia, and an associated invasive carcinoma) and 4 subtypes (gastric, intestinal, pancreatobiliary, and oncocytic). The expression of MUC1, MUC2, MUC5AC, MUC6, and CDX2 was investigated by immunohistochemistry in IPMNs and PDACs with and without IPMNs. The mutational status of GNAS and KRAS was evaluated by cycle sequencing in PDACs and pre-/coexisting IPMNs. RESULTS: Twenty-six synchronous or metachronous PDACs were identified in 20 patients (11.2%) with IPMNs. Occurrence of concomitant PDACs was more frequently observed in gastric-type IPMNs (18/110, 16.4%) compared with intestinal (1/49, 2.0%), pancreatobiliary (1/17, 5.9%), or oncocytic-type (0/3, 0%) (P = 0.047). Both PDACs with and without IPMNs were frequently positive for MUC1, MUC5AC, and MUC6 expression, as assessed by immunohistochemistry, but were negative for MUC2 and CDX2. The mucin-staining patterns were similar to those of invasive tubular adenocarcinoma arising from gastric-type IPMNs. Mutation of GNAS within codon 201 was not detected in PDACs and gastric-type IPMNs, whereas most of these exhibited KRAS mutations. However, the R201H GNAS mutation was detected in 1 intestinal-type IPMN with distinct PDAC. CONCLUSIONS: Mucin expression patterns demonstrate that PDAC without GNAS mutations of an aggressive phenotype frequently arise in the pancreas with benign gastric-type IPMN in the absence of GNAS mutations.

6 Article Surgery for chronic pancreatitis decreases the risk for pancreatic cancer: a multicenter retrospective analysis. 2013

Ueda, Junji / Tanaka, Masao / Ohtsuka, Takao / Tokunaga, Shoji / Shimosegawa, Tooru / Anonymous1570737. ·Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. ·Surgery · Pubmed #22989892.

ABSTRACT: BACKGROUND: Chronic pancreatitis is suggested to be one of the risk factors for the development of pancreatic cancer. The aim of this study was to confirm the high incidence of pancreatic cancer in patients with chronic pancreatitis in Japan and to determine the factors associated with the risk for pancreatic cancer in patients with chronic pancreatitis. METHODS: The working group of the Research Committee of Intractable Disease supported by the Ministry of Health, Labour and Welfare of Japan carried out a nationwide survey to investigate the relationship between chronic pancreatitis and pancreatic cancer. This retrospective study included patients diagnosed with chronic pancreatitis who had had at least 2 years of follow-up. They were contacted through 22 Japanese referral centers experienced in the management of chronic pancreatitis. RESULTS: The standardized incidence ratio (95 CI) of pancreatic cancer was 11.8 (7.1-18.4). The incidence of pancreatic cancer was significantly lower in patients who had received surgery for chronic pancreatitis than in those who had not undergone surgery (hazard ratio estimated by Cox regression 0.11; 95% CI, 0.0014-0.80; P = .03). Patients who continued to drink alcohol after diagnosis of chronic pancreatitis showed a significantly higher incidence of pancreatic cancer than those who stopped drinking after diagnosis of chronic pancreatitis (hazard ratio, 5.07; 95% CI, 1.13-22.73; P = .03). CONCLUSION: This study confirmed that chronic pancreatitis is an important risk factor for the development of pancreatic cancer in Japan. Patients who underwent surgery for the treatment of chronic pancreatitis had significantly lower incidences of pancreatic cancer. Surgery for chronic pancreatitis may inhibit the development of pancreatic cancer in patients with chronic pancreatitis.