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Takai T.,Hyogo Cancer Center
Journal of Dermatology | Year: 2017

Keratoacanthoma is a common epithelial lesion, but its nature is controversial. Although a distinct crateriform appearance is a hallmark of keratoacanthoma, other benign or malignant skin lesions may show a similar architecture. Moreover, as lesions diagnosed as conventional keratoacanthoma may show malignant behavior, some authors consider keratoacanthoma to be a variant of squamous cell carcinoma, whereas others consider it as a distinct self-resolving squamous proliferative lesion. The controversy seems to originate from the diverse behavior of keratoacanthoma-like epithelial lesions. However, a reproducible histopathological classification criterion has been recently proposed in the diagnosis of keratoacanthoma-like epithelial lesions, and its validity is supported by several reports that deal with the natural course or molecular aspects of these lesions. This article attempts to provide a comprehensive review on recent insights and advances in the histopathological diagnosis of keratoacanthoma or related lesions, as well as summary of related published works. © 2017 Japanese Dermatological Association

Tsutani Y.,Hiroshima University | Miyata Y.,Hiroshima University | Nakayama H.,Kanagawa Cancer Center | Okumura S.,Cancer Institute Hospital | And 3 more authors.
Chest | Year: 2014

Background: The purpose of this multicenter study was to characterize ground glass opacity (GGO)-dominant clinical stage IA lung adenocarcinomas and evaluate prognosis of these tumors after sublobar resection, such as segmentectomy and wedge resection. Methods: We evaluated 610 consecutive patients with clinical stage IA lung adenocarcinoma who underwent complete resection after preoperative high-resolution CT scanning and 18 F-fluorodeoxyglucose PET/CT scanning and revealed 239 (39.2%) that had a >50% GGO component. Results: GGO-dominant tumors rarely exhibited pathologic invasiveness, including lymphatic, vascular, or pleural invasion and lymph node metastasis. There was no significant difference in 3-year recurrence-free survival (RFS) among patients who underwent lobectomy (96.4%), segmentectomy (96.1%), and wedge resection (98.7%) of GGO-dominant tumors (P = .44). Furthermore, for GGO-dominant T1b tumors, 3-year RFS was similar in patients who underwent lobectomy (93.7%), segmentectomy (92.9%), and wedge resection (100%, P = .66). Two of 84 patients (2.4%) with GGO-dominant T1b tumors had lymph node metastasis. Multivariate Cox analysis showed that tumor size, maximum standardized uptake value on 18F-fluorodeoxyglucose PET/CT scan, and surgical procedure did not affect RFS in GGO-dominant tumors. Conclusions: GGO-dominant clinical stage IA lung adenocarcinomas are a uniform group of tumors that exhibit low-grade malignancy and have an extremely favorable prognosis. Patients with GGOdominant clinical stage IA adenocarcinomas can be successfully treated with wedge resection of a T1a tumor and segmentectomy of a T1b tumor. © 2014 American College of Chest Physicians.

Fujino Y.,Hyogo Cancer Center
World Journal of Gastroenterology | Year: 2010

The two-layer cold storage method (TLM) was first reported in 1988, consisting of a perfluorochemical (PFC) and initially Euro-Collins' solution, which was later replaced by University of Wisconsin solution (UW). PFC is a biologically inert liquid and acts as an oxygen-supplying agent. A pancreas preserved using the TLM is oxygenated through the PFC and substrates are supplied by the UW solution. This allows the pancreas preserved using the TLM to generate adenosine triphosphate during storage, prolonging the preservation time. In a canine model, the TLM was shown to repair and resuscitate warm ischemically damaged pancreata during preservation, improve pancreas graft survival after transplantation, and also improve the islet yield after isolation. Clinical trials using the TLM in pancreas preservation before whole-pancreas transplantation and islet isolation have shown promising outcomes. We describe the role of the TLM in pancreas and islet transplantation. © 2010 Baishideng.

Oda H.,Hyogo Cancer Center
Nippon Hoshasen Gijutsu Gakkai zasshi | Year: 2010

The radiopharmaceutical strontium chloride ((89)Sr) has been released as a new means of pain relief for painful bone metastasis in cancer patients. Because (89)Sr is a pure beta-emitting nuclide, it was considered difficult to know its distribution in the body from outside. Imaging with a gamma camera using bremsstrahlung radiation has been reported as one method, but there has been little detailed basic examination. We examined the optimal energy window and collimator when imaging with a gamma camera using bremsstrahlung radiation produced from (89)Sr beta rays. The results showed that setting the energy window at 75 keV, which is the peak formed by the characteristic X-ray of lead that is produced by the interaction of bremsstrahlung radiation and lead, is optimal for imaging. Also important are the material of the collimator and the use of an MELP collimator.

Tsutani Y.,Hiroshima University | Miyata Y.,Hiroshima University | Nakayama H.,Kanagawa Cancer Center | Okumura S.,Cancer Institute Hospital | And 3 more authors.
Journal of Thoracic and Cardiovascular Surgery | Year: 2013

Objective: Our objective was to compare the oncologic outcomes of lobectomy and segmentectomy for clinical stage IA lung adenocarcinoma. Methods: We examined 481 of 618 consecutive patients with clinical stage IA lung adenocarcinoma who underwent lobectomy or segmentectomy after preoperative high-resolution computed tomography and F-18-fluorodeoxyglucose positron emission tomography/computed tomography. Patients (n = 137) who underwent wedge resection were excluded. Lobectomy (n = 383) and segmentectomy (n = 98) as well as surgical results were analyzed for all patients and their propensity score-matched pairs. Results: Recurrence-free survival (RFS) and overall survival (OS) were not significantly different between patients undergoing lobectomy (3-year RFS, 87.3%; 3-year OS, 94.1%) and segmentectomy (3-year RFS, 91.4%; hazard ratio [HR], 0.57; 95% confidence interval [CI], 0.27-1.20; P =.14; 3-year OS, 96.9%; HR, 0.49; 95% CI, 0.17-1.38; P =.18). Significant differences in clinical factors such as solid tumor size (P <.001), maximum standardized uptake value (SUVmax) (P <.001), and tumor location (side, P =.005; lobe, P =.001) were observed between both treatment groups. In 81 propensity score-matched pairs including variables such as age, gender, solid tumor size, SUVmax, side, and lobe, RFS and OS were similar between patients undergoing lobectomy (3-year RFS, 92.9%, 3-year OS, 93.2%) and segmentectomy (3-year RFS, 90.9%; 3-year OS, 95.7%). Conclusions: Segmentectomy is suitable for clinical stage IA lung adenocarcinoma, with survivals equivalent to those of standard lobectomy. © 2013 by The American Association for Thoracic Surgery.

Miyagawa S.,Graduate University for Advanced Studies | Sato M.,Graduate University for Advanced Studies | Sudo T.,Hyogo Cancer Center | Yamada G.,Wakayama Medical University | Iguchi T.,Graduate University for Advanced Studies
Oncogene | Year: 2015

Numerous studies support a role of phosphatase and tensin homolog deleted from chromosome 10 (Pten) as a tumor suppressor gene that controls epithelial cell homeostasis to prevent tumor formation. Mouse vaginal epithelium cyclically exhibits cell proliferation and differentiation in response to estrogen and provides a unique model for analyzing homeostasis of stratified squamous epithelia. We analyzed vaginal epithelium-specific Pten conditional knockout (CKO) mice to provide new insights into Pten/phosphoinositide-3-kinase (PI3K)/Akt function. The vaginal epithelium of ovariectomized (OVX) mice (control) was composed of 1-2 layers of cuboidal cells, whereas OVX CKO mice exhibited epithelial hyperplasia in the suprabasal cells with increased cell mass and mucin production. This is possibly due to misactivation of mammalian target of rapamycin and mitogen-activated protein kinase. Intriguingly, estrogen administration to OVX Pten CKO mice induced stratification and keratinized differentiation in the vaginal epithelium, as in estrogen-treated controls. We found that Pten is exclusively expressed in the suprabasal cells in the absence of estrogens, whereas estrogen administration induced Pten expression in the basal cells. This suggests that Pten acts to prevent excessive cell proliferation as in the case of other squamous tissues. Thus, Pten exhibits a dual role on the control of vaginal homeostasis, depending on whether estrogens are present or absent. Our results provide new insights into how Pten functions in tissue homeostasis.

Misago N.,Saga University | Takai T.,Hyogo Cancer Center | Toda S.,Saga University | Narisawa Y.,Saga University
Journal of Cutaneous Pathology | Year: 2014

Background Although the precise etiology of keratoacanthoma (KA) is unknown, KA is generally assumed to differentiate toward hair follicles based on previous studies of experimental carcinogenesis. Methods We performed a comprehensive immunohistochemical study of various follicular markers in all stages of KA. A total of 67 tumors, including 16 early or proliferative stage lesions, 43 well-developed stage lesions, five regressing stage lesions and three regressed stage lesions, were subjected to the analysis. Results CK15 (clone C8/144B), CK19 and CD34 were not expressed at any stage. CK1, CK10, CK16, CK17, CK15 (clone LHK15) and calretinin showed dynamic changes in their expression in KA depending on the stage. Conclusions KA is a follicular neoplasm with infundibular/isthmic (upper segmental region of hair follicles) differentiation. It is considered that early or proliferative stage tumors show keratin-filled invaginations with infundibular differentiation and gradual isthmic differentiation. Well-developed examples of KA generally show isthmic differentiation in the whole lesions. The regressed stage KAs lose the features of this type of follicular differentiation and show epidermal characteristics. No expression of CK15 (clone C8/144B) was observed in KAs, although this finding is insufficient to completely rule out the correlation between the regression of KA and the hair follicle cycle. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Takekida S.,Hyogo Cancer Center
International journal of gynecological cancer : official journal of the International Gynecological Cancer Society | Year: 2010

The efficacy and toxicity of combination chemotherapy with docetaxel + carboplatin were evaluated in patients with locally advanced or recurrent cervical cancer. A total of 71 patients with cervical cancer were enrolled into this trial, and 66 patients were considered eligible. The patients were administered docetaxel at 60 mg/m2 followed by carboplatin based on area under the curve of 6, both by intravenous infusion, every 3 weeks, with the treatment repeated for 1 to 6 cycles depending on the goal of the therapy. The response was evaluated based on the Response Evaluation Criteria in Solid Tumors criteria. Toxicity to chemotherapy was evaluated according to the National Cancer Institute Common Toxicity Criteria. Of the 66 eligible patients, 62 had locally advanced cervical cancer with no history of previous treatment, whereas 4 patients had recurrent cervical cancer. A total 149 cycles of chemotherapy were administered, with a median of 2.3 cycles (range, 1-6) per patient. The overall clinical response rate was 63.7% (44/66, 95% confidence interval, 52.1-75.3). In the neoadjuvant chemotherapy setting, the overall clinical response rate was 69.3% (43/62; 43/62, 95% confidence interval, 57.8-80.8), and the response rates in patients with squamous cell carcinoma and nonsquamous cell carcinoma were 69.7% (23/33, 95% confidence interval, 54.0-85.4) and 68.9% (20/29, 95% confidence interval, 52.1-85.7), respectively. On the other hand, in patients with recurrent cervical cancer, the overall response rate was 25.0% (1/4, 95% confidence interval, -17.4 to 67.4). Nonhematological toxicities were mainly grade 1 or 2. Hematological toxicity was encountered mostly in the form of neutropenia and thrombocytopenia. Combination chemotherapy with docetaxel + carboplatin is a safe and well-tolerated treatment for patients with advanced cervical cancer and is effective against not only squamous cell carcinoma, but also adenocarcinoma.

Tsujino K.,Hyogo Cancer Center
Japanese Journal of Clinical Radiology | Year: 2014

We conducted a nationwide survey about the sedation methods of intracavitary brachytherapy for cervical cancer. Responses were obtained from 141/171 institutions (84%). Intravenous conscious sedation or more intensive sedation was used in 39%. Most of the radiation oncologists especially who uses weaker medication felt that their sedation methods were not adequate enough for some patients. The frequent reasons for not using more intensive sedation included the lack of manpower and concerns about safety. The establishment of safe and adequate sedative management system is required.

Fujino Y.,Hyogo Cancer Center
World Journal of Gastroenterology | Year: 2015

Recent advances in surgical techniques and perioperative management have markedly reduced operative morbidity after distal pancreatectomy (DP). However, some questions remain regarding the protocol for the perioperative management of DP, in particular, with regard to the development of pancreatic fistula (PF). A review of DP was therefore conducted in order to standardize the management of patients for a favorable outcome. Overall, operative technique and perioperative management emerged as two critical factors contributing to favorable outcome in DP patients. As for the operative method, surgical and closure techniques exhibited differences in outcome. Laparoscopic DP generally yields more favorable perioperative outcomes compared to open DP, and is applicable for benign tumors and some ductal carcinomas of the pancreas. Robotic DP is also available for safe pancreatic surgery. En bloc celiac axis resection offers a high R0 resection rate and potentially allows for some local control in the case of advanced pancreatic cancer. Following resection, staple closure was not found to reduce the rate of PF when compared to hand-sewn closure. In addition, ultrasonic dissection devices, fibrin glue sealing, and staple closure with mesh reinforcement were shown to significantly reduce PF, although there was some bias in these studies. In perioperative management, both preoperative and postoperative treatment affected outcome. First, preoperative endoscopic pancreatic stenting may be an effective prophylactic measure against fistula development following DP in selected patients. Second, in postoperative management, a multifactorial approach including prophylactic antibiotics improved high surgical site infection rates following complex hepato-pancreatobiliary surgery. Furthermore, although conflicting results have been reported, somatostatin analogues should be administered selectively to patients considered to have a high risk for PF. Finally, careful drain management also facilitates a favorable outcome in patients with PF after DP. The results of the review indicate that laparoscopic DP coupled with perioperative management influences outcome in DP patients. © 2015 Baishideng Publishing Group Inc. All rights reserved.

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