Kenichi Hirabayashi

Summary

Country: Japan

Publications

  1. doi request reprint Perivascular epithelioid cell tumor (PEComa) of the pancreas: immunoelectron microscopy and review of the literature
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, Kanagawa 259 1193, Japan
    Pathol Int 59:650-5. 2009
  2. pmc Clinical significance of wall invasion pattern of subserosa-invasive gallbladder carcinoma
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    Oncol Rep 28:1531-6. 2012
  3. ncbi request reprint Wall-invasion pattern correlates with survival of patients with gallbladder adenocarcinoma
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    Anticancer Res 29:685-91. 2009
  4. pmc Synchronous pancreatic solid pseudopapillary neoplasm and intraductal papillary mucinous neoplasm
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, Isehara 259 1193, Japan
    World J Gastroenterol 19:3358-63. 2013
  5. doi request reprint Nonfunctioning pancreatic endocrine tumor with extension into the main pancreatic duct: report of a case
    Naoki Yazawa
    Department of Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259 1193, Japan
    Surg Today 41:737-40. 2011
  6. doi request reprint The distance of tumor spread in the main pancreatic duct of an intraductal papillary-mucinous neoplasm: where to resect and how to predict it
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    J Hepatobiliary Pancreat Sci 17:516-22. 2010
  7. ncbi request reprint Stromal thrombospondin-1 expression is a prognostic indicator and a new marker of invasiveness in intraductal papillary-mucinous neoplasm of the pancreas
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
    Biomed Res 31:13-9. 2010
  8. ncbi request reprint Curative surgical treatment after preoperative chemotherapy for primarily inoperable locally advanced pancreatic carcinoma: report of a case
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259 1193, Japan
    Tokai J Exp Clin Med 34:53-7. 2009
  9. doi request reprint Granulosa cell tumor with activated mTOR-HIF-1alpha-VEGF pathway
    Masaki Miyazawa
    Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan
    J Obstet Gynaecol Res 36:448-53. 2010
  10. doi request reprint Therapeutic strategy targeting the mTOR-HIF-1alpha-VEGF pathway in ovarian clear cell adenocarcinoma
    Masaki Miyazawa
    Department of Pathology, Tokai University School of Medicine, Isehara, Japan
    Pathol Int 59:19-27. 2009

Collaborators

Detail Information

Publications22

  1. doi request reprint Perivascular epithelioid cell tumor (PEComa) of the pancreas: immunoelectron microscopy and review of the literature
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, Kanagawa 259 1193, Japan
    Pathol Int 59:650-5. 2009
    ..The results of immunoelectron microscopy show that some PEComas possess not only typical melanosomes or premelanosomes but also aberrant melanosomes...
  2. pmc Clinical significance of wall invasion pattern of subserosa-invasive gallbladder carcinoma
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    Oncol Rep 28:1531-6. 2012
    ..0023, log-rank test). The wall invasion pattern could contribute to decision-making concerning curative resection for subserosal invasive GBC...
  3. ncbi request reprint Wall-invasion pattern correlates with survival of patients with gallbladder adenocarcinoma
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    Anticancer Res 29:685-91. 2009
    ..039-0.629) was an independent predictor of mortality. In conclusion, the DG invasion pattern is an indicator of high malignant potential and indirectly worsens the prognosis of patients with gallbladder adenocarcinoma...
  4. pmc Synchronous pancreatic solid pseudopapillary neoplasm and intraductal papillary mucinous neoplasm
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, Isehara 259 1193, Japan
    World J Gastroenterol 19:3358-63. 2013
    ..These results suggest that β-catenin abnormality is not a common pathogenetic factor of synchronous SPN and IPMN...
  5. doi request reprint Nonfunctioning pancreatic endocrine tumor with extension into the main pancreatic duct: report of a case
    Naoki Yazawa
    Department of Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259 1193, Japan
    Surg Today 41:737-40. 2011
    ..Histological examination confirmed well-differentiated endocrine carcinoma. We review reported cases of the intraductal growth of NFPETs and discuss the pathogenesis of these unusual tumors...
  6. doi request reprint The distance of tumor spread in the main pancreatic duct of an intraductal papillary-mucinous neoplasm: where to resect and how to predict it
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    J Hepatobiliary Pancreat Sci 17:516-22. 2010
    ..We analyzed the appropriate surgical margin based on the DTS in the main pancreatic duct of IPMN and the positive rate at the pancreatic cut end margin...
  7. ncbi request reprint Stromal thrombospondin-1 expression is a prognostic indicator and a new marker of invasiveness in intraductal papillary-mucinous neoplasm of the pancreas
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
    Biomed Res 31:13-9. 2010
    ..001). In conclusion, stromal TSP1 expression is a prognostic indicator and a new marker of invasiveness in IPMN...
  8. ncbi request reprint Curative surgical treatment after preoperative chemotherapy for primarily inoperable locally advanced pancreatic carcinoma: report of a case
    Ken Ichi Okada
    Department of Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259 1193, Japan
    Tokai J Exp Clin Med 34:53-7. 2009
    ....
  9. doi request reprint Granulosa cell tumor with activated mTOR-HIF-1alpha-VEGF pathway
    Masaki Miyazawa
    Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan
    J Obstet Gynaecol Res 36:448-53. 2010
    ..It was concluded that mTOR-targeted therapy may represent a promising strategy for some GCT with an activated mTOR-HIF-1alpha-VEGF pathway...
  10. doi request reprint Therapeutic strategy targeting the mTOR-HIF-1alpha-VEGF pathway in ovarian clear cell adenocarcinoma
    Masaki Miyazawa
    Department of Pathology, Tokai University School of Medicine, Isehara, Japan
    Pathol Int 59:19-27. 2009
    ..In conclusion, mTOR-targeted therapy through usage of drugs such as everolimus may be more effective for CLA of the ovary because of its significant expression of p-mTOR...
  11. doi request reprint Leiomyosarcoma of the pancreas: report of a case
    Hideki Izumi
    Department of Gastroenterological Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259 1193, Japan
    Surg Today 41:1556-61. 2011
    ..Based on these findings, we confirmed a diagnosis of leiomyosarcoma originating from the pancreas. During 14 months of follow-up to date, there has not been any evidence of local recurrence or distant metastasis...
  12. doi request reprint First case of primary phyllodes tumor of the pancreas: case report and findings of immunohistochemical and ultrastructural studies
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, Japan
    Virchows Arch 456:587-93. 2010
    ..However, the histological findings in the present case differed from those of these tumors. The present lesion is the first reported case of a primary pancreatic phyllodes tumor...
  13. doi request reprint Immunohistochemical expression of somatostatin type 2A receptor in neuroendocrine carcinoma of uterine cervix
    Hiroshi Kajiwara
    Department of Pathology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259 1193, Japan
    Arch Gynecol Obstet 279:521-5. 2009
    ..SSTR2A-positive neuroendocrine tumors may be treatable by SS analogues. Uterine cervical neuroendocrine carcinoma is generally associated with poor prognosis...
  14. doi request reprint An annular pancreas associated with carcinoma of the papilla of Vater: report of a case
    Naoki Yazawa
    Department of Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259 1193, Japan
    Surg Today 42:497-501. 2012
    ..We also provide a review of the reported cases of an annular pancreas with periampullary neoplasms and discuss the clinical characteristics of this anomaly...
  15. doi request reprint A case of oncocytic carcinoma of the endometrium
    Hiroshi Kajiwara
    Department of Pathology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
    Arch Gynecol Obstet 279:733-8. 2009
    ..The Ki-67 labeling index was approximately 50%. Immunostaining revealed endometrial oncocytic carcinoma. Distinguishing between primary uterine neoplasm and carcinoma caused by metastasis of breast cancer appears important...
  16. pmc Small serotonin-positive pancreatic endocrine tumors caused obstruction of the main pancreatic duct
    Masami Ogawa
    Department of Gastroenterology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259 1193, Japan
    World J Gastroenterol 18:6669-73. 2012
    ..We report 2 cases of serotonin-positive pancreatic endocrine tumors that caused stricture of the MPD in spite of the small size of the tumor...
  17. doi request reprint Clear cell adenocarcinoma arising from adenomyosis
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine, Isehara, Kanagawa 259 1193, Japan
    Int J Gynecol Pathol 28:262-6. 2009
    ..Malignant tumor arising from adenomyosis should be considered as a differential diagnosis when the serum level of tumor markers such as CA125 is high and when the tumor is intramyometrial...
  18. doi request reprint Association of hypoxia-inducible factor-1 expression with histology in epithelial ovarian tumors: a quantitative analysis of HIF-1
    Masaki Miyazawa
    Department of Pathology, Tokai University, Tokyo, Japan
    Arch Gynecol Obstet 279:789-96. 2009
    ....
  19. ncbi request reprint Stromal laminin-5gamma2 chain expression is associated with the wall-invasion pattern of gallbladder adenocarcinoma
    Ken Ichi Okada
    Departments of Surgery, Tokai University School of Medicine, Kanagawa, Japan
    Biomed Res 30:53-62. 2009
    ..068). In conclusion, high-grade cell proliferation and stromal laminin-5gamma2 staining were significantly correlated with a wall-invasion pattern of aggressive gallbladder carcinoma indicating destructive growth (DG type)...
  20. pmc Histopathology of gastrointestinal neuroendocrine neoplasms
    Kenichi Hirabayashi
    Department of Pathology, Ospedale Sacro Cuore Don Calabria Negrar, Verona, Italy Department of Pathology, Tokai University School of Medicine Isehara, Kanagawa, Japan
    Front Oncol 3:2. 2013
    ..In addition, we will address the histological features of GI-NEN in specific organs...
  21. ncbi request reprint Inflammatory pseudotumor of the liver: case report and review of literature
    Megumi Motojuku
    Department of Critical Care and Emergency Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, Japan
    Tokai J Exp Clin Med 33:70-4. 2008
    ..On the other hand, since it may show spontaneous regression, indications for surgery must be assessed very carefully...
  22. ncbi request reprint Cytological features of the cystic fluid of pancreatic schwannoma with cystic degeneration. A case report
    Kenichi Hirabayashi
    Department of Pathology, Tokai University School of Medicine Kanagawa, Japan
    JOP 9:203-8. 2008
    ..Schwannomas are benign neoplasms arising from peripheral nerve tissue. Pancreatic schwannoma is a very rare condition. We present the histological and cytological features of a pancreatic schwannoma with cystic degeneration...