Kenichi Hirabayashi

Summary

Affiliation: Tokai University
Country: Japan

Publications

  1. ncbi IgG4-related disease
    K Hirabayashi
    Department of Pathology, Ospedale Sacro Cuore Don Calabria, Negrar VR, Italy
    Pathologica 104:43-55. 2012
  2. ncbi 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
  3. ncbi 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
  4. ncbi 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
  5. ncbi 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
  6. ncbi 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
  7. ncbi 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
  8. ncbi 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
  9. ncbi 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
  10. ncbi 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

Collaborators

Detail Information

Publications22

  1. ncbi IgG4-related disease
    K Hirabayashi
    Department of Pathology, Ospedale Sacro Cuore Don Calabria, Negrar VR, Italy
    Pathologica 104:43-55. 2012
    ..Correct identification is crucial to avoid unnecessary major surgical procedures and initiate corticosteroid therapy...
  2. ncbi 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...
  3. ncbi 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...
  4. ncbi 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...
  5. ncbi 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...
  6. ncbi 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...
  7. ncbi 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...
  8. ncbi 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...
  9. ncbi 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...
  10. ncbi 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
    ....
  11. ncbi 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...
  12. ncbi 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...
  13. ncbi 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. ncbi 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. ncbi 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. ncbi 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...
  17. ncbi 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
    ....
  18. ncbi 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)...
  19. ncbi 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...
  20. ncbi 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...
  21. ncbi Ovarian nongestational choriocarcinoma mixed with various epithelial malignancies in association with endometriosis
    Kenichi Hirabayashi
    Department of Pathology, Tokai University, School of Medicine, Bohseidai, Isehara, Kanagawa 259-1193, Japan
    Gynecol Oncol 102:111-7. 2006
    ..Coexistence of CC with small cell carcinoma is considered to be responsible for relative chemoresistance leading to poor prognosis...
  22. ncbi 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...