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Hideaki Goto, Naomi Kiyota, Naoki Otsuki, Yoshinori Imamura, Naoko Chayahara, Hirotaka Suto, Yoshiaki Nagatani, Masanori Toyoda, Toru Mukohara, Ken-Ichi Nibu, Toshihiko Kasahara, Yasuhiro Ito, Akihiro Miya, Mitsuyoshi Hirokawa, Akira Miyauchi, Hironobu Minami
Sorafenib and lenvatinib showed efficacy for patients with radioactive iodine (RAI)-refractory differentiated thyroid cancer (DTC) in pivotal phase 3 clinical trials. Although the efficacy of lenvatinib in patients who received previous treatment with multi-target kinase inhibitors (m-TKIs), including sorafenib, was reported, the efficacy of sorafenib in patients who previously received lenvatinib remains unknown. A 75-year-old woman diagnosed as RAI-refractory poorly differentiated carcinoma with multiple lung metastases and started treatment with lenvatinib...
May 17, 2018: Auris, Nasus, Larynx
Chisato Mogi, Hirotaka Shinomiya, Natsumi Fujii, Tomoyuki Tsuruta, Naruhiko Morita, Tatsuya Furukawa, Masanori Teshima, Maki Kanzawa, Mitsuyoshi Hirokawa, Naoki Otsuki, Ken-Ichi Nibu
Carcinoma arising in lingual thyroid is an extremely rare entity accounting for only 1% of all reported ectopic thyroids. Here, we report a case of carcinoma arising in lingual thyroid, which has been successfully managed by transoral resection and bilateral neck dissections. A lingual mass 4-cm in diameter with calcification was incidentally detected by computed tomography at medical check-up. No thyroid tissue was observed in normal position. Ultrasound examination showed bilateral multiple lymphadenopathies...
May 15, 2018: Auris, Nasus, Larynx
Jonathan M Soh, Glynis A Scott, Theodore I Hirokawa, Lindsey B Dolohanty
Intralymphatic histiocytosis is a rare disorder associated with a variety of inflammatory conditions. We report the case of an 89-year-old woman with a history of a right knee replacement and a ruptured popliteal cyst who developed an erythematous indurated plaque over the surgical scar. Histopathology revealed fibrosis, chronic inflammation, and histiocytes within the lymphatics consistent with intralymphatic histiocytosis. The plaque flattened following intralesional injection of triamcinolone acetonide 10 mg/cc×1...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
Yoshihiro Inoue, Ryo Tanaka, Kensuke Fujii, Nao Kawaguchi, Masatsugu Ishii, Shinsuke Masubuchi, Masashi Yamamoto, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
INTRODUCTION: The rising proportion of elderly patients (aged 80 yearsor above) in our population means that more elderly patients are undergoing hepatectomy. METHODS: Five-hundred and thirty patients who underwent hepatectomy for hepatocellular carcinoma (HCC) were retrospectively analyzed with respect to their preoperative status and perioperative results, including remnant liver regeneration. The remnant liver volume was postoperatively measured with multidetector CT on postoperative day 7 and 1, 2, 5, and 12 months after surgery...
May 14, 2018: Digestive Surgery
Kunio Hamanaka, Yuusuke Hirokawa, Tsuyoshi Itoh, Michio Yamasaki, Kazuki Hayashi, Satoru Sawai, Kei Nishiyama
Intra-abdominal injury is an uncommon complication of chest tube insertion. A 66-year-old man had empyema and underwent chest tube insertion for drainage. Massive hemorrhage occurred; the postprocedural radiograph showed the malpositioned chest tube in the mediastinum. Computed tomography scan showed that the tube's tip penetrated through the liver capsule and passed through the hepatic vein to the right ventricle. Hepatic tract embolization with coiling was performed during chest tube removal under a controlled condition with the hepatic tract occluded by a balloon catheter...
May 1, 2018: Cardiovascular and Interventional Radiology
Kenichiro Ishii, Takeshi Sasaki, Kazuhiro Iguchi, Shinya Kajiwara, Manabu Kato, Hideki Kanda, Yoshifumi Hirokawa, Kiminobu Arima, Atsushi Mizokami, Yoshiki Sugimura
BACKGROUND: The reduced androgen-sensitivity of prostate cancer (PCa) cells is an important clinical development because of its association with the cells' progression to castration-resistant prostate cancer (CRPC). During androgen deprivation therapy (ADT), stroma-derived growth factors and cytokines can activate the androgen receptor (AR). For example, IL-6 is a multifunctional cytokine that is involved in the malignancy of PCa cells through AR activation. In the present study, we used an androgen-sensitive human PCa cell line (LNCaP) and its sublines to investigate the relationship between the responsiveness of PCa cells to IL-6 treatment and the cellular AR signaling pathway...
April 29, 2018: Prostate
Yasuhiro Ito, Akira Miyauchi, Mitsuyoshi Hirokawa, Masatoshi Yamamoto, Hitomi Oda, Hiroo Masuoka, Hisanori Sasai, Mitsuhiro Fukushima, Takuya Higashiyama, Minoru Kihara, Akihiro Miya
The tumor-node-metastasis (TNM) staging system is most commonly adopted to evaluate the prognosis of patients with thyroid carcinoma. The 8th edition of the TNM staging system, an extensively revised version of the 7th edition, was recently released. We aimed to investigate whether and how well the 8th edition reflects the cause-specific survival (CSS) of patients with papillary thyroid carcinoma by analyzing the cases in 5,892 patients who underwent initial surgery at Kuma Hospital between 1987 and 2005. The median postoperative follow-up duration was 178 months (range: 6-357 months)...
April 20, 2018: Endocrine Journal
Shuhei Kawamura, Yoshihiko Ito, Takatsugu Hirokawa, Eriko Hikiyama, Shizuo Yamada, Satoshi Shuto
We hypothesized that if drug localization can be restricted to a particular subcellular domain where their target proteins reside, the drugs could bind to their target proteins without being metabolized and/or excreted, which would significantly extend the half-life of the corresponding drug-target complex. Thus, we designed ligand-phospholipid conjugates, in which the ligand is conjugated with a phospholipid through a polyethylene glycol linker, to restrict the subcellular localization of the ligand in the vicinity of the lipid bilayer...
April 13, 2018: Journal of Medicinal Chemistry
Yasuhiro Ito, Akira Miyauchi, Mitsuyoshi Hirokawa, Masatoshi Yamamoto, Hitomi Oda, Hiroo Masuoka, Hisanori Sasai, Mitsuhiro Fukushima, Takuya Higashiyama, Minoru Kihara, Akihiro Miya
Follicular thyroid carcinoma (FTC), a form of differentiated thyroid carcinoma, is the second most common malignancy arising from thyroid follicular cells. Recently, the tumor-node-metastasis (TNM) classification for differentiated thyroid carcinoma was revised from the 7th to the 8th edition. The diagnostic criteria for poorly differentiated carcinoma (PDC) were also updated in the latest World Health Organization (WHO) classification. In this study, we investigated whether these changes are appropriate for accurately predicting prognosis...
April 4, 2018: Endocrine Journal
Takuji Magata, Yoshimi Hirokawa, Aya Furokawa, Kazuhisa Takeuchi, Yoshiaki Ohtomo, Toshitaka Kino, Jun Kominami, Yuto Nakai, Maria Kitamura, Naoyoshi Maezaki
Positional isomers of naturally occurring peptide subunits were synthesized via highly diastereoselective reduction of tert-butylsulfinyl ketimines as a key reaction. While NaBH4 reduction of ketimines derived from 2-thiazolyl ketones afforded the (RS ,R)-isomer with moderate diastereoselectivity, L-Selectride® reduction afforded the (RS ,S)-isomer as the sole product. In contrast, ketimines derived from tert-butyl 2-thiazolyl ketone afforded the (RS ,R)-isomer with low diastereoselectivity by both NaBH4 and L-Selectride® reduction...
2018: Chemical & Pharmaceutical Bulletin
Ayana Suzuki, Mitsuyoshi Hirokawa, Aki Ito, Nami Takada, Miyoko Higuchi, Toshitetsu Hayashi, Seiji Kuma, Akira Miyauchi
OBJECTIVE: To identify cytological differences between mucosa-associated lymphoid tissue lymphoma (MALT-L) and nonneoplastic lymphocytes using thyroid liquid-based cytology (LBC). STUDY DESIGN: We observed LBC and conventional specimens from 35 MALT-L cases, 3 diffuse large B-cell cell lymphoma (DLBCL) cases, and 44 prominent nonneoplastic lymphocytic infiltration cases. RESULTS: In MALT-L cases, the incidence of lymphoglandular bodies in the LBC specimens was lower than that in the conventional specimens (p < 0...
March 29, 2018: Acta Cytologica
Hiroki Yamada, Takahiro Takeda, Toshiki Uchihara, Shizuko Sato, Susumu Kirimura, Yuka Hirota, Makoto Kodama, Masanobu Kitagawa, Katsuiku Hirokawa, Takanori Yokota, Shuta Toru
Subicular degeneration occurs in amyotrophic lateral sclerosis (ALS) patients. However, it was unknown whether microscopic subicular degeneration could be observed as macroscopic changes and whether these changes were associated with the transactive-response DNA binding protein 43 kDa (TDP-43) pathology. Topographic differences between subicular degeneration caused by ALS and Alzheimer disease (AD) had also not been characterized. Here we investigated the subiculum and related areas in autopsied brains from 3 ALS and 3 AD patients...
March 23, 2018: European Neurology
Yoshihiro Inoue, Yusuke Suzuki, Masato Ota, Kensuke Fujii, Nao Kawaguchi, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
The aim of this study was to evaluate the degree of invasiveness and the clinical outcomes of laparoscopic parenchyma-sparing hepatectomy (LPSH) for a maximum hepatocellular carcinoma (HCC) size ≤5 cm. Sixty-one LPSHs and 175 open parenchyma-sparing hepatectomies (OPSHs) for small-sized HCC were analyzed using a propensity score matching analysis. The median operative time was significantly shorter in the LPSH group (194 min) than in the OPSH group (275 minutes) (P < 0.0001). The estimated blood loss was significantly lower in the LPSH group (100 mL) than in the OPSH group (380 mL) (P < 0...
February 1, 2018: American Surgeon
Kaori Wakabayashi, Takahiko Umahara, Katsuiku Hirokawa, Haruo Hanyu, Toshiki Uchihara
α-Synuclein shares structural homology with 14-3-3 proteins. Seven 14-3-3 protein isoforms have been identified in mammals. Among them, the 14-3-3 sigma isoform was initially considered absent in the mammalian brain. However, we previously identified immunohistochemical association of 14-3-3 sigma with Pick bodies. Because 14-3-3 isoforms other than sigma isoform have been identified in Lewy bodies, we were prompted to look for this 14-3-3 sigma-like immunoreactivity (IR) in Lewy bodies in the brainstem, cerebral cortex, and Lewy neurites in seven patients with Lewy body disease...
May 1, 2018: Neuroscience Letters
Yoshihiro Inoue, Kensuke Fujii, Keitaro Tashiro, Masatsugu Ishii, Shinsuke Masubuchi, Masashi Yamamoto, Tetsunosuke Shimizu, Mitsuhiro Asakuma, Fumitoshi Hirokawa, Michihiro Hayashi, Yoshihumi Narumi, Kazuhisa Uchiyama
BACKGROUND: Various chemotherapy regimens have been shown to improve outcomes when administered before tumor excision surgery. However, there is no consensus on the utility of multidisciplinary treatment with preoperative chemotherapy for treating colorectal liver metastasis (CLM). MATERIALS AND METHODS: Two hundred-fifty patients who underwent hepatectomy were retrospectively analyzed using propensity score matching. Postoperative outcomes were evaluated with a focus on the effect of pre-hepatectomy chemotherapy on regeneration of the remnant liver in patients with CLM...
March 16, 2018: World Journal of Surgery
Ayana Suzuki, Mitsuyoshi Hirokawa, Aki Ito, Nami Takada, Miyoko Higuchi, Toshitetsu Hayashi, Seiji Kuma, Tsutomu Daa, Akira Miyauchi
The pathogenesis of thyroid lymphoepithelial cysts is controversial, and two hypotheses have been proposed, namely derivation from branchial-derived remnants or from squamous metaplasia of the follicular cells. The aim of this study was to clarify the pathogenesis of thyroid lymphoepithelial cysts. We performed pathological and immunohistochemical examination of 21 thyroid lymphoepithelial cysts, 13 non-neoplastic squamous metaplasia samples without thyroid carcinoma, 13 solid cell nests, and 14 lateral cervical cysts...
March 14, 2018: Endocrine Journal
Yuzo Maeda, Hiroki Takahashi, Nozomu Nakai, Takeshi Yanagita, Nanako Ando, Tomotaka Okubo, Kenta Saito, Kazuyoshi Shiga, Takahisa Hirokawa, Masayasu Hara, Hideyuki Ishiguro, Yoichi Matsuo, Shuji Takiguchi
Apigenin is a natural flavonoid that exhibits anti-proliferative activity and induces apoptosis in various types of cancer, including colon cancer. The aim of the present study was to determine the mechanism underlying the apoptosis-inducing effect of apigenin in colon cancer. Apigenin reduced the proliferation of colon cancer cell lines, stimulated the cleavage of PARP and induced apoptosis in a dose-dependent manner. Apigenin treatment also suppressed the expression of the anti-apoptotic proteins Bcl-xL and Mcl-1...
March 7, 2018: International Journal of Oncology
Masanori Tsukamoto, Jun Hirokawa, Takashi Hitosugi, Takeshi Yokoyama
Tracheal bronchus is an ectopic bronchus almost arising from the right side of the tracheal wall above the carina. The incidence of a tracheal bronchus is reported as 0.1 to 3%. We experienced a patient with tracheal bronchus that was incidentally found at induction of anesthesia. Endotracheal intubation in a patient with tracheal bronchus might cause obstruction of the tracheal bronchus, although in this case, ventilation was not impaired.
2018: Anesthesia Progress
Yosuke Sakamoto, Motoki Goda, Jun Hirokawa
The heterogeneous release of molecular bromine, Br2 , from the reaction between gaseous ozone and aqueous bromide ion in seawater ice and sea salt aerosols is considered to be an initial source of reactive bromine species in the troposphere. Recent studies have demonstrated that the uptake of ozone by aqueous bromide solution is promoted by reactions at the gas-liquid interface. The present work investigated the heterogeneous reaction between gaseous ozone and aqueous bromide solution at atmospheric pressure and room temperature using a wetted wall flow reactor combined with a chemical ionization mass spectrometer...
March 15, 2018: Journal of Physical Chemistry. A
Tetsunosuke Shimizu, Mitsuhiro Asakuma, Atsushi Tomioka, Yoshihiro Inoue, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
Because pancreatic cancer is a disease with a dismal prognosis due to the high rate of early recurrence even after curative surgery, selecting the most effective treatment in an individual requires preoperative assessment of the tumor characteristics, including the potential for early recurrence. The study cohort included 84 patients undergoing surgical resection of pancreatic cancer. Univariate and multivariate analyses were conducted to identify the risk factors for early recurrence within six months after curative resection...
January 1, 2018: American Surgeon
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