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150 results on '"Mimura, Hidefumi"'

3. Percutaneous ultrasound-guided cryoablation for early-stage primary breast cancer: a follow-up study in Japan

Author

Kawamoto, Hisanori, Tsugawa, Koichiro, Furuya, Yuko, Sakamaki, Kaori, Kakimoto, Sayoko, Kitajima, Mina, Takishita, Mariko Nagai, Tazo, Mizuho, Nakano, Mari Hara, Kuroda, Takako, Shimo, Ayaka, Shimo, Arata, Kojima, Yasuyuki, Tsuzuki, Makiko, Motoyoshi, Ai, Haku, Ei, Nishikawa, Toru, Kanemaki, Yoshihide, Mimura, Hidefumi, and Fukuda, Mamoru

Published
2024
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12. Japanese clinical practice guidelines for vascular anomalies 2017

Author

Mimura, Hidefumi, Akita, Sadanori, Fujino, Akihiro, Jinnin, Masatoshi, Ozaki, Mine, Osuga, Keigo, Nakaoka, Hiroki, Morii, Eiichi, Kuramochi, Akira, Aoki, Yoko, Arai, Yasunori, Aramaki, Noriko, Inoue, Masanori, Iwashina, Yuki, Iwanaka, Tadashi, Ueno, Shigeru, Umezawa, Akihiro, Ozeki, Michio, Ochi, Junko, Kinoshita, Yoshiaki, Kurita, Masakazu, Seike, Shien, Takakura, Nobuyuki, Takahashi, Masataka, Tachibana, Takao, Chuman, Kumiko, Nagata, Shuji, Narushima, Mitsunaga, Niimi, Yasunari, Nosaka, Shunsuke, Nozaki, Taiki, Hashimoto, Kazuki, Hayashi, Ayato, Hirakawa, Satoshi, Fujikawa, Atsuko, Hori, Yumiko, Matsuoka, Kentaro, Mori, Hideki, Yamamoto, Yuki, Yuzuriha, Shunsuke, Rikihisa, Naoaki, Watanabe, Shoji, Watanabe, Shinichi, Kuroda, Tatsuo, Sugawara, Shunsuke, Ishikawa, Kosuke, and Sasaki, Satoru

Published
2020
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38. A feasibility study of percutaneous transhepatic gallbladder filling (PTGBF) in a swine model.

Author

Ogawa, Yukihisa, Kubota, Manabu, Takagi, Masayuki, and Mimura, Hidefumi

Subjects
PILOT projects, GENERAL anesthesia, ANIMAL experimentation, CHOLECYSTITIS, SWINE, POSTOPERATIVE care, THERAPEUTIC embolization, HYPODERMIC needles, POLYMERS, EUTHANASIA, DESCRIPTIVE statistics, MEDICAL drainage, COMPUTED tomography, ACUTE diseases, PATIENT safety, LONG-term health care
Abstract

Background: Treatments for acute cholecystitis include cholecystectomy and percutaneous drainage. However, some patients are at high risk for surgery, and prolonged drainage can decrease their quality of life. Purpose: To determine the feasibility of percutaneous transhepatic gallbladder filling (PTGBF) with n-butyl-cyanoacrylate (NBCA) in a swine model. Material and methods: After the induction of general anesthesia, percutaneous transhepatic gallbladder puncture to a pig weighing 49 kg using a 20-G-percutaneous transhepatic cholangio drain (PTCD) needle was performed under ultrasound guidance. A 2.1 F-microcatheter was inserted through the outer PTCD needle, then the cystic duct was coil-embolized. The microcatheter was removed, the gallbladder was filled with 25% NBCA-Lipiodol, then the PTCD needle was withdrawn without complications. Blood was sampled and CT images were acquired from the pig immediately after the procedure and on postoperative day 7. The pig was euthanized on postoperative day 7 and the gallbladder was evaluated by microscopy. Results: Vital signs were stable, and the CT images showed that the gallbladder contained NBCA-Lipiodol without complications such as leakage. Hepatobiliary enzymes were not elevated. Histological findings demonstrated loss of most mucosa with partial regeneration, and lymphocytic infiltration. The muscle layer was intact. Conclusion: This technique might offer a feasible alternative to surgery for high-risk patients with acute cholecystitis, but further studies are needed to determine the safety and long-term effects of this procedure. [ABSTRACT FROM AUTHOR]

Published
2022
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48. Risk factors of interventional radiology/surgery for colonic diverticular bleeding.

Author

Sato, Yoshinori, Yasuda, Hiroshi, Nakamoto, Yusuke, Kiyokawa, Hirofumi, Yamashita, Masaki, Matsuo, Yasumasa, Maehata, Tadateru, Yamamoto, Hiroyuki, Mimura, Hidefumi, and Itoh, Fumio

Subjects
INTERVENTIONAL radiology, HEMOSTASIS, ENDOSCOPY
Abstract

Background and Aim: Colonic diverticular bleeding (CDB) stops spontaneously, but sometimes, excessive bleeding does not allow hemostasis and requires interventional radiology (IR)/surgery. We examined risk factors in patients who required IR/surgery for CDB and late recurrent bleeding rate after IR/surgery. Methods: This retrospective case–control study was conducted at a tertiary center. We included 608 patients who required hospitalization for CDB. Patients were investigated for risk factors using logistic regression analysis. We also investigated early and late recurrent bleeding rates following IR/surgery. Results: In 261 patients (42.9%), the bleeding source was identified, and endoscopic hemostasis was performed; 23 (3.8%) required IR/surgery. In multivariate analysis, shock state with a blood pressure of ≤90 mmHg (P < 0.001; odds ratio [OR], 20.1; 95% confidence interval [CI], 5.08–79.5), positive extravasation on contrast‐enhanced computed tomography (P < 0.001; OR 9.5, 95% CI 2.85–31.4), two or more early recurrent bleeding episodes (P = 0.002; OR 7.4, 95% CI 2.14–25.4), and right colon as the source of bleeding (P = 0.023; OR 4.1, 95% CI 1.25–14.0) were independent risk factors requiring IR/surgery. Early recurrent bleeding was observed in 0% and 28.0% patients (P < 0.001) in the IR/surgery and no IR/surgery groups, respectively, whereas late recurrent bleeding rate was observed in 43.4% and 30.7% patients (P = 0.203) in the IR/surgery and no IR/surgery groups, respectively. Four patients who required surgery experienced late recurrent bleeding at a site different from the initial CDB. Conclusions: Although IR/surgery is an effective hemostatic treatment wherein endoscopic treatment is unsuccessful, late recurrent bleeding cannot be prevented. [ABSTRACT FROM AUTHOR]

Published
2021
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49. MRI findings of spring ligament injury: association with surgical findings and flatfoot deformity.

Author

Kimura, Yusuke, Yamashiro, Tsuneo, Saito, Yuki, Kitsukawa, Kaoru, Niki, Hisateru, and Mimura, Hidefumi

Subjects
LIGAMENT injuries, FLATFOOT, MAGNETIC resonance imaging, SPRING, DIAGNOSIS
Abstract

Background: Spring ligament injury is an important cause for flatfoot deformity; however, reliability of magnetic resonance imaging (MRI) findings of spring ligament injury is still ambiguous. Purpose: To investigate the reliability of MRI findings for the diagnosis of spring ligament injury. Material and methods: Forty-three cases with spring ligament injury proven by surgery and 29 control cases were enrolled. The spring ligament complex was demonstrated on proton density-weighted images reconstructed from 3D-isotropic MRI data. The presence of waviness, discontinuity, and abnormally high signal intensity of the spring ligament complex was evaluated by two radiologists in cooperation. Also, injury of the posterior tibial tendon (PTT) on MRI and the lateral talo-1st metatarsal angles on weight-bearing X-rays were evaluated. Results: Discontinuity and abnormally high signal intensity of the superomedial calcaneonavicular ligament (SmCNL) on MRI were more frequently observed in patients with spring ligament injury than in controls (p < 0.001). Discontinuity and abnormally high signal intensity of the SmCNL were found more often in the PTT injury group than in those without (p < 0.001). The talo-1st metatarsal angle was greater in patients with discontinuity and abnormally high signal intensity of the SmCNL on MRI than in patients without these findings (p < 0.001). Conclusion: Discontinuity and abnormally high signal intensity are reliable MRI findings for spring ligament injury and related disorders, such as flatfoot deformity and PTT injury. [ABSTRACT FROM AUTHOR]

Published
2020
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50. Apparent diffusion coefficient (ADC) values of serous, endometrioid, and clear cell carcinoma of the ovary: pathological correlation.

Author

Ono, Takafumi, Kishimoto, Keiko, Tajima, Shinya, Maeda, Ichiro, Takagi, Masayuki, Suzuki, Nao, and Mimura, Hidefumi

Subjects
OVARIAN epithelial cancer, DIFFUSION coefficients, DIFFUSION magnetic resonance imaging, MAGNETIC resonance imaging, OVARIES, INVERSE relationships (Mathematics)
Abstract

Background: Primary epithelial ovarian cancer is divided into several subtypes. The relationships between apparent diffusion coefficient (ADC) values and their subtypes have not yet been established.Purpose: To investigate whether ADC values of epithelial ovarian cancer vary according to histologic tumor cellularity and evaluate the difference of clear cell carcinoma (CCC), high-grade serous carcinoma (HGSC), and endometrioid carcinoma (EC).Material and Methods: This retrospective study included 51 cases of epithelial ovarian cancer (17 CCC, 20 HGSC, and 14 EC) identified by magnetic resonance imaging with pathological confirmation. All patients underwent diffusion-weighted imaging and the ADC values of lesions were measured. We counted the tumor cells in three high-power fields and calculated the average for each case. The Spearman's correlation coefficient test was used to analyze correlation between ADC values and tumor cellularity. The ADC values of HGSC, EC, and CCC were compared using the Steel-Dwass test.Results: The ADC values of all cases were significantly inversely correlated with tumor cellularity (rs = -0.761; P < 0.001). The mean ± SD ADC values (×10-3 mm2/s) of CCC, HGSC, and EC were 1.24 ± 0.17 (range 0.98--1.65), 0.84 ± 0.10 (range 0.67--1.06), and 0.84 ± 0.10 (range 0.67--1.07). The mean ± SD tumor cellularity of CCC, HGSC, and EC was 162.88 ± 63.28 (range 90.33--305.67), 440.60 ± 119.86 (range 204.67--655.67), and 461.02 ± 81.86 (range 333.33--602.33).Conclusion: There is a significant inverse correlation between ADC values and tumor cellularity in epithelial ovarian cancer. The mean ADC value of CCC was higher than those of HGSC and EC, seemingly due to the low cellularity of CCC. [ABSTRACT FROM AUTHOR]

Published
2020
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