All Stories

  1. Phase 1/2 study of liposomal irinotecan plus S-1 for metastatic pancreatic cancer refractory to gemcitabine-based treatment

    Article • European Journal of Cancer, June 2025, Elsevier

    Hiroshi Imaoka

  2. Impact of clinically diagnosed liver cirrhosis in patients with intrahepatic cholangiocarcinoma treated with systemic chemotherapy: a subgroup analysis of JCOG1113

    Article • Japanese Journal of Clinical Oncology, March 2025, Oxford University Press (OUP)

    Hiroshi Imaoka

  3. Correction: Efficacy of liposomal irinotecan + 5-FU/LV vs. S-1 in gemcitabine-refractory metastatic pancreatic cancer: a real-world study using inverse probability of treatment weighting

    Article • Journal of Gastroenterology, January 2025, Springer Science + Business Media

    Hiroshi Imaoka

  4. Assessment of heterogeneity according to hospital or medical experience factors in outcomes of chemotherapy for advanced biliary tract cancer: a post-hoc analysis of JCOG1113

    Article • Japanese Journal of Clinical Oncology, January 2025, Oxford University Press (OUP)

    Hiroshi Imaoka

  5. Efficacy of liposomal irinotecan + 5-FU/LV vs. S-1 in gemcitabine-refractory metastatic pancreatic cancer: a real-world study using inverse probability of treatment weighting

    Article • Journal of Gastroenterology, November 2024, Springer Science + Business Media

    Hiroshi Imaoka

  6. Current status of the cost burden of first-line systemic treatment for patients with advanced hepatocellular carcinoma in Japan, 2021–22

    Article • Japanese Journal of Clinical Oncology, June 2024, Oxford University Press (OUP)

    Hiroshi Imaoka

  7. Development of a nomogram to predict survival in advanced biliary tract cancer

    Article • Scientific Reports, December 2023, Springer Science + Business Media

    Hiroshi Imaoka

  8. Comprehensive review of undifferentiated carcinoma of the pancreas: from epidemiology to treatment

    Article • Japanese Journal of Clinical Oncology, June 2023, Oxford University Press (OUP)

    Hiroshi Imaoka

  9. Impact of Endoscopic Ultrasound-Guided Tissue Acquisition on Decision-Making in Precision Medicine for Pancreatic Cancer: Beyond Diagnosis

    Article • Diagnostics, June 2021, MDPI AG

    Hiroshi Imaoka

  10. Risk stratification and prognostic factors in patients with unresectable undifferentiated carcinoma of the pancreas

    Article • Pancreatology, June 2021, Elsevier

    Hiroshi Imaoka

  11. Clinical outcomes of chemotherapy in patients with undifferentiated carcinoma of the pancreas: a retrospective multicenter cohort study

    Article • BMC Cancer, October 2020, Springer Science + Business Media

    Hiroshi Imaoka

  12. Clinical outcomes of chemotherapy in patients with undifferentiated carcinoma of the pancreas: A retrospective multicenter cohort study

    Article • September 2020, Springer Science + Business Media

    Hiroshi Imaoka

  13. Clinical Outcomes of Chemotherapy in Patients with Undifferentiated Carcinoma of the Pancreas: A Retrospective Multicenter Cohort Study

    Article • July 2020, Springer Science + Business Media

    Hiroshi Imaoka

  14. Chemotherapy-induced neutropenia as a prognostic factor in patients with pancreatic cancer treated with gemcitabine plus nab-paclitaxel: a retrospective cohort study

    Article • Cancer Chemotherapy and Pharmacology, July 2020, Springer Science + Business Media

    Hiroshi Imaoka

  15. Impact of the Duration of Diabetes Mellitus on the Outcome of Metastatic Pancreatic Cancer Treated with Gemcitabine: A Retrospective Study

    Article • Internal Medicine, September 2019, Japanese Society of Internal Medicine

    Hiroshi Imaoka

  16. New Era of Endoscopic Ultrasound-Guided Tissue Acquisition: Next-Generation Sequencing by Endoscopic Ultrasound-Guided Sampling for Pancreatic Cancer

    Article • Journal of Clinical Medicine, August 2019, MDPI AG

    Hiroshi Imaoka

  17. Safety and efficacy of endoscopic ultrasound‐guided fine needle aspiration for pancreatic masses: A prospective multicenter study

    Article • Digestive Endoscopy, July 2019, Wiley

    Hiroshi Imaoka

  18. EUS-guided n-butyl-2-cyanoacrylate injection therapy for ruptured isolated left gastric artery pseudoaneurysm

    Article • Endoscopic Ultrasound, January 2019, Wolters Kluwer Health

    Hiroshi Imaoka

  19. Endoscopic Ultrasound-Guided Gallbladder Drainage for Aberrant Right Posterior Duct Obstruction Developing after Placement of a Covered Self-Expandable Metallic Stent in a Patient with Distal Biliary Obstruction

    Article • Case Reports in Gastroenterology, November 2018, Karger Publishers

    Hiroshi Imaoka

  20. Clinical characteristics of Japanese patients with epithelioid hemangioendothelioma: a multicenter retrospective study

    Article • BMC Cancer, October 2018, Springer Science + Business Media

    Hiroshi Imaoka

  21. Predictive factors of the treatment outcome in patients with advanced biliary tract cancer receiving gemcitabine plus cisplatin as first-line chemotherapy

    Article • Journal of Gastroenterology, October 2018, Springer Science + Business Media

    Hiroshi Imaoka

  22. Alternate Endpoints for Phase II Trials in Advanced Neuroendocrine Tumors

    Article • The Oncologist, August 2018, Alphamed Press

    Hiroshi Imaoka

  23. Multi-center clinical evaluation of streptozocin-based chemotherapy for advanced pancreatic neuroendocrine tumors in Japan: focus on weekly regimens and monotherapy

    Article • Cancer Chemotherapy and Pharmacology, July 2018, Springer Science + Business Media

    Hiroshi Imaoka

  24. Comparative evaluation of new and conventional classifications of magnifying endoscopy with narrow band imaging for invasion depth of superficial esophageal squamous cell carcinoma

    Article • Diseases of the Esophagus, August 2017, Oxford University Press (OUP)

    Hiroshi Imaoka

  25. Progression-free survival as a surrogate endpoint in advanced neuroendocrine neoplasms

    Article • Endocrine Related Cancer, July 2017, Bioscientifica

    Hiroshi Imaoka

  26. Multicenter, randomized, open-label Phase II study comparing S-1 alternate-day oral therapy with the standard daily regimen as a first-line treatment in patients with unresectable advanced pancreatic cancer

    Article • Cancer Chemotherapy and Pharmacology, March 2017, Springer Science + Business Media

    Hiroshi Imaoka

  27. The Features of Colorectal Tumors in a Patient with Li-Fraumeni Syndrome

    Article • Internal Medicine, January 2017, Japanese Society of Internal Medicine

    Hiroshi Imaoka

  28. Treatment of biliary strictures with fully covered self-expandable metal stents after pancreaticoduodenectomy

    Article • Endoscopy, December 2016, Thieme Publishing Group

    Hiroshi Imaoka

  29. Phase II clinical trial using novel peptide cocktail vaccine as a postoperative adjuvant treatment for surgically resected pancreatic cancer patients

    Article • International Journal of Cancer, November 2016, Wiley

    Hiroshi Imaoka

  30. Prognostic impact of carcinoembryonic antigen (CEA) on patients with metastatic pancreatic cancer: A retrospective cohort study

    Article • Pancreatology, September 2016, Elsevier

    Hiroshi Imaoka

  31. Benefits of side‐by‐side deployment of 6‐mm covered self‐expandable metal stents for hilar malignant biliary obstructions

    Article • Journal of Hepato-Biliary-Pancreatic Sciences, August 2016, Wiley

    Hiroshi Imaoka

  32. Post-adjuvant chemotherapy CA19-9 levels predict prognosis in patients with pancreatic ductal adenocarcinoma: A retrospective cohort study

    Article • Pancreatology, July 2016, Elsevier

    Hiroshi Imaoka

  33. Clinical outcome of elderly patients with unresectable pancreatic cancer treated with gemcitabine plus S-1, S-1 alone, or gemcitabine alone: Subgroup analysis of a randomised phase III trial, GEST study.

    Article • European Journal of Cancer, February 2016, Elsevier

    Hiroshi Imaoka

  34. Evaluation of Modified Glasgow Prognostic Score for Pancreatic Cancer

    Article • Pancreas, February 2016, Wolters Kluwer Health

    Hiroshi Imaoka

  35. Diagnostic performance and factors influencing the accuracy of EUS-FNA of pancreatic neuroendocrine neoplasms

    Article • Journal of Gastroenterology, January 2016, Springer Science + Business Media

    Hiroshi Imaoka

  36. Clinical impact of preoperative endoscopic ultrasound-guided fine-needle aspiration for pancreatic ductal adenocarcinoma

    Article • Endoscopic Ultrasound, January 2016, Wolters Kluwer Health

    Hiroshi Imaoka

  37. Endoscopic ultrasonography-guided biliary drainage: Who, when, which, and how?

    Article • World Journal of Gastroenterology, January 2016, Baishideng Publishing Group Co., Limited (formerly WJG Press)

    Hiroshi Imaoka

  38. Type of Combined Endoscopic Biliary and Gastroduodenal Stenting Is Significant for Biliary Route Maintenance

    Article • Internal Medicine, January 2016, Japanese Society of Internal Medicine

    Hiroshi Imaoka

  39. Comparison of the clinical impact of endoscopic ultrasound-guided choledochoduodenostomy and hepaticogastrostomy for bile duct obstruction with duodenal obstruction

    Article • Endoscopy, September 2015, Thieme Publishing Group

    Hiroshi Imaoka

  40. Comparison of the clinical impact of endoscopic ultrasound-guided choledochoduodenostomy and hepaticogastrostomy for bile duct obstruction with duodenal obstruction

    Article • Endoscopy, September 2015, Thieme Publishing Group

    Hiroshi Imaoka

  41. Risk factors for postoperative recurrence of intraductal papillary mucinous neoplasms of the pancreas based on a long‐term follow‐up study: proposals for follow‐up strategies

    Article • Journal of Hepato-Biliary-Pancreatic Sciences, August 2015, Wiley

    Hiroshi Imaoka

  42. Stent migration into the peritoneal cavity following endoscopic ultrasound-guided hepaticogastrostomy

    Article • Endoscopy, June 2015, Thieme Publishing Group

    Hiroshi Imaoka

  43. Morphological differentiation and follow-up of pancreatic cystic neoplasms using endoscopic ultrasound

    Article • Endoscopic Ultrasound, January 2015, Medknow

    Hiroshi Imaoka

  44. A Randomized Controlled Trial Evaluating a Low-Volume PEG Solution Plus Ascorbic Acid versus Standard PEG Solution in Bowel Preparation for Colonoscopy

    Article • Gastroenterology Research and Practice, January 2015, Hindawi Publishing Corporation

    Hiroshi Imaoka

  45. Combination of cyst fluid CEA and CA 125 is an accurate diagnostic tool for differentiating mucinous cystic neoplasms from intraductal papillary mucinous neoplasms

    Article • Pancreatology, November 2014, Elsevier

    Hiroshi Imaoka

  46. Clinical course of gastrointestinal stromal tumor diagnosed by endoscopic ultrasound-guided fine-needle aspiration

    Article • Digestive Endoscopy, September 2014, Wiley

    Hiroshi Imaoka

  47. Does the WHO 2010 classification of pancreatic neuroendocrine neoplasms accurately characterize pancreatic neuroendocrine carcinomas?

    Article • Journal of Gastroenterology, August 2014, Springer Science + Business Media

    Hiroshi Imaoka

  48. A novel technique for endoscopic transpapillary “mapping biopsy specimens” of superficial intraductal spread of bile duct carcinoma (with videos)

    Article • Gastrointestinal Endoscopy, June 2014, Elsevier

    Hiroshi Imaoka

  49. Ring-enhancement pattern on contrast-enhanced CT predicts adenosquamous carcinoma of the pancreas: A matched case-control study

    Article • Pancreatology, May 2014, Elsevier

    Hiroshi Imaoka

  50. Gastroduodenal stenting with Niti‐S stent: Long‐term benefits and additional stent intervention

    Article • Digestive Endoscopy, April 2014, Wiley

    Hiroshi Imaoka

  51. Can Long-Term Follow-Up Strategies Be Determined Using a Nomogram-Based Prediction Model of Malignancy Among Intraductal Papillary Mucinous Neoplasms of the Pancreas?

    Article • Pancreas, April 2014, Wolters Kluwer Health

    Hiroshi Imaoka

  52. Clinical Characteristics of Adenosquamous Carcinoma of the Pancreas

    Article • Pancreas, March 2014, Wolters Kluwer Health

    Hiroshi Imaoka

  53. Endoscopic ultrasound description of liver segmentation and anatomy

    Article • Digestive Endoscopy, December 2013, Wiley

    Hiroshi Imaoka

  54. Evaluation of Ki-67 index in EUS–FNA specimens for the assessment of malignancy risk in pancreatic neuroendocrine tumors

    Article • Endoscopy, November 2013, Thieme Publishing Group

    Hiroshi Imaoka

  55. Risk of second malignancies in patients with gastric marginal zone lymphomas of mucosa associate lymphoid tissue (MALT)

    Article • Journal of Gastroenterology, June 2013, Springer Science + Business Media

    Hiroshi Imaoka

  56. Prospective clinical study of endoscopic ultrasound-guided choledochoduodenostomy with direct metallic stent placement using a forward-viewing echoendoscope

    Article • Endoscopy, January 2013, Thieme Publishing Group

    Hiroshi Imaoka

  57. Can mosapride citrate reduce the volume of lavage solution for colonoscopy preparation?

    Article • World Journal of Gastroenterology, January 2013, Baishideng Publishing Group Co., Limited (formerly WJG Press)

    Hiroshi Imaoka

  58. Cytoplasmic expression of LGR5 in pancreatic adenocarcinoma

    Article • Frontiers in Physiology, January 2013, Frontiers

    Hiroshi Imaoka

  59. Diagnostic ability and factors affecting accuracy of endoscopic ultrasound-guided fine needle aspiration for pancreatic solid lesions: Japanese large single center experience

    Article • Journal of Gastroenterology, October 2012, Springer Science + Business Media

    Hiroshi Imaoka

  60. Prognostic value of K-ras mutation status and subtypes in endoscopic ultrasound-guided fine-needle aspiration specimens from patients with unresectable pancreatic cancer

    Article • Journal of Gastroenterology, September 2012, Springer Science + Business Media

    Hiroshi Imaoka

  61. A case of pancreatic neuroendocrine tumor in a patient with neurofibromatosis-1

    Article • World Journal of Surgical Oncology, July 2012, Springer Science + Business Media

    Hiroshi Imaoka

  62. Endoscopic Ultrasound-Guided Choledochoduodenostomy for Malignant Lower Biliary Tract Obstruction

    Article • Gastrointestinal Endoscopy Clinics of North America, April 2012, Elsevier

    Hiroshi Imaoka

  63. Can Endoscopic Ultrasound-Guided Fine Needle Aspiration Offer Clinical Benefit for Tumors of the Ampulla of Vater? -An Initial Study

    Article • Endoscopic Ultrasound, January 2012, Hong Kong STM Publishing Co., Ltd.

    Hiroshi Imaoka

  64. Pseudomyxoma peritonei arising from intraductal papillary neoplasm after surgical pancreatectomy: report of 2 cases and review of the literature

    Article • Clinical Journal of Gastroenterology, December 2011, Springer Science + Business Media

    Hiroshi Imaoka

  65. Diagnostic yield of endoscopic retrograde cholangiography and of EUS‐guided fine needle aspiration sampling in gallbladder carcinomas

    Article • Journal of Hepato-Biliary-Pancreatic Sciences, November 2011, Wiley

    Hiroshi Imaoka

  66. Comparison of endoscopic submucosal dissection and endoscopic mucosal resection for large colorectal tumors

    Article • European Journal of Gastroenterology & Hepatology, November 2011, Wolters Kluwer Health

    Hiroshi Imaoka

  67. Fibroblast-derived HB-EGF promotes Cdx2 expression in esophageal squamous cells

    Article • Laboratory Investigation, July 2010, Elsevier

    Hiroshi Imaoka

  68. Exacerbation of indomethacin-induced small intestinal injuries in Reg I-knockout mice

    Article • AJP Gastrointestinal and Liver Physiology, May 2010, American Physiological Society

    Hiroshi Imaoka

  69. In vivo evidence for the role of RegI in gastric regeneration: transgenic overexpression of RegI accelerates the healing of experimental gastric ulcers

    Article • Laboratory Investigation, April 2010, Elsevier

    Hiroshi Imaoka

  70. Is Autofluorescence Imaging Endoscopy Useful for Determining the Depth of Invasion in Gastric Cancer

    Article • Digestion, January 2010, Karger Publishers

    Hiroshi Imaoka

  71. Rare pancreatic neoplasms: the utility of endoscopic ultrasound-guided fine-needle aspiration—a large single center study

    Article • Journal of Gastroenterology, February 2009, Springer Science + Business Media

    Hiroshi Imaoka

  72. Irritable bowel syndrome and inflammatory bowel disease: infectious gastroenteritis-related disorders?

    Article • Clinical Journal of Gastroenterology, January 2009, Springer Science + Business Media

    Hiroshi Imaoka

  73. Endoscopic Ultrasound-Guided Fine-Needle Aspiration of a Mixed Acinar-Endocrine Carcinoma: A Case Report

    Article • The American Journal of Gastroenterology, October 2008, Nature

    Hiroshi Imaoka

  74. API2‐MALT1 chimeric transcript‐positive gastroduodenal MALT lymphoma with subsequent development of adenocarcinoma as a collision tumour over a clinical course of 7 years

    Article • Histopathology, June 2007, Wiley

    Hiroshi Imaoka

  75. EUS-guided choledochoduodenostomy for palliative biliary drainage in case of papillary obstruction: report of 2 cases

    Article • Gastrointestinal Endoscopy, October 2006, Elsevier

    Hiroshi Imaoka

  76. A Japanese case of eosinophilic esophagitis

    Article • Journal of Gastroenterology, June 2006, Springer Science + Business Media

    Hiroshi Imaoka

  77. Pseudomyxoma Peritonei Caused by Acute Pancreatitis in Intraductal Papillary Mucinous Carcinoma of the Pancreas

    Article • Pancreas, March 2006, Wolters Kluwer Health

    Hiroshi Imaoka

  78. LONG‐TERM FOLLOW UP OF PATIENTS WITH SMALL GASTROINTESTINAL STROMAL TUMORS IN THE STOMACH USING ENDOSCOPIC ULTRASONOGRAPHY‐GUIDED FINE‐NEEDLE ASPIRATION BIOPSY

    Article • Digestive Endoscopy, December 2005, Wiley

    Hiroshi Imaoka

  79. Pancreatic Endocrine Neoplasm Can Mimic Serous Cystadenoma

    Article • International Journal of Gastrointestinal Cancer, January 2005, Springer Science + Business Media

    Hiroshi Imaoka

  80. Endoscopic ultrasonography‐guided fine‐needle aspiration biopsy: A safe method for accurate diagnosis

    Article • Digestive Endoscopy, March 2004, Wiley

    Hiroshi Imaoka