Hirofumi Watanabe

Pituitary neuroendocrine tumor with transsellar anastomosis concomitant with internal carotid artery agenesis: illustrative case

Ryosuke Tashiro, Tomohiro Kawaguchi, Kentaro Izumi, Tomohisa Ishida et autres

BACKGROUND: Endoscopic transsphenoidal surgery is the standard treatment for pituitary neuroendocrine tumors (PitNETs); however, preserving pituitary function by maintaining adequate vascular supply remains challenging. Unilateral internal carotid artery (ICA) agenesis with transsellar anastomosis is rare and has not been reported in association …

jp (code pays fourni par la source)

Hypercalcemia associated with relapsed medulloblastoma due to bone metastasis: illustrative case

Rikuto Ito, Masayuki Kanamori, Yoshiteru Shimoda, Masahiro Irie et autres

BACKGROUND: Medulloblastoma can cause extraneural metastasis, particularly to the bones. However, only a few reports have shown that hypercalcemia occurs with medulloblastoma, and there are no reports on hypercalcemia causing consciousness disturbance. OBSERVATIONS: A 17-year-old male patient was treated for medulloblastoma with …

jp (code pays fourni par la source)

Entrapment of a Guidewire Caused by the Chiari Network during Implantation of a Central Venous Port

Shonosuke Wakayama, Rika Saito, Kota Ouchi, Yuya Yoshida et autres

A central venous (CV) port is an important device for cancer treatment, as it enables safe venous access. We herein report the case of an 82-year-old man with recurrent gastric cancer who experienced J-tip spring guidewire entrapment caused by the Chiari network …

jp (code pays fourni par la source)

A Case Report of Alpha-Fetoprotein-Producing Pancreatic Neuroendocrine Tumor and Review of the Literature

Hirofumi Watanabe, Satsuki Kubo, Fumiyoshi Fujishima, Keiju Sasaki et autres

This report describes a 63-year-old woman diagnosed with an alpha-fetoprotein (AFP)-producing pancreatic neuroendocrine tumor (NET) that exhibited rapid progression and liver metastasis. Although AFP is associated with hepatocellular carcinoma and germ cell tumors, its production in NETs is unusual. Despite limited literature …

jp (code pays fourni par la source)

GLP- 1R status using validated monoclonal antibody in 689 cases of neuroendocrine neoplasm and its correlation with somatostatin receptor scintigraphy, insulin production, and histological grades

Hirofumi Watanabe, Fumiyoshi Fujishima, Yuto Yamazaki, Masayuki Imamura et autres

Abstract Radiolabeled glucagon-like peptide 1 (GLP- 1) analog scintigraphy is a new, high-sensitivity imaging method for detecting small insulinomas. Somatostatin receptor scintigraphy (SRS) is an established method for detecting gastroenteropancreatic neuroendocrine tumors. However, small benign insulinomas are difficult to detect using SRS. …

jp (code pays fourni par la source)

Primary hepatic alpha-fetoprotein-producing neuroendocrine neoplasm harboring FGFR2 and TP53 mutations: a case report and literature review

Hirofumi Watanabe, Kodai Enda, Fumiyoshi Fujishima, Hidekazu Shirota et autres

This report presents a rare case of a 45-year-old man diagnosed with a primary hepatic alpha-fetoprotein-producing neuroendocrine neoplasm, a condition rarely reported in the literature. The patient presented with initial symptoms of back and epigastric pain, after which multiple liver lesions were …

jp (code pays fourni par la source)

Gastric Leiomyosarcoma Completely Resected by Endoscopic Submucosal Dissection after a Precise Preoperative Diagnosis

Kazuma Yachi, Waku Hatta, Tomoyuki Koike, Kimiko Kayada et autres

A 68-year-old woman was diagnosed with leiomyosarcoma (LMS) based on preoperative biopsy of the gastric body. As tumor invasion confined to the submucosa with no breaking of the submucosal layer was confirmed on endoscopic ultrasonography (EUS), the patient underwent endoscopic submucosal dissection …

jp (code pays fourni par la source)

Pulse Switching Shock Suppression Method of PWM Inverter for Pole-Changing Induction Motor

Hirotaka Kato, Hirofumi Watanabe, J. Itoh, Masashi Kobayashi

This paper proposes a pulse switching shock suppression method for a PWM inverter, which consists of two original approaches: (i) a switching method between a synchronous and an asynchronous carrier-based PWM during pole-changing and (ii) a pulse pattern switching method of the …

jp (code pays fourni par la source)

Achievement of 6.78-MHz and 3-kW Single Inverter in Continuous Operation

Masamichi Yamaguchi, Yusuke Uchida, Hirofumi Watanabe, K. Kusaka et autres

This paper proposes a design flow and implementation method of a high-frequency and high-power inverter for wireless power transfer(WPT) systems. This design flow is revealed to achieve zero-voltage-switching (ZVS) operation and lower the thermal resistance for 3-kW continuous operation in 6.78 MHz. …

jp (code pays fourni par la source)

Immunohistochemical and in situ hybridization analyses of glucose transporter 2 in pancreatic neuroendocrine tumors: Possible glucose transporter 2 association with neoplastic insulin production

Hirofumi Watanabe, Fumiyoshi Fujishima, Michiaki Unno, Hironobu Sasano et autres

jp (code pays fourni par la source)

Mucinous Amphicrine Carcinoma of the Pancreas: A Diagnostic Pitfall

Hirofumi Watanabe, Yuto Yamazaki, Shin Miura, Satoshi Higuchi et autres

jp (code pays fourni par la source)

Somatostatin receptor 2 in 10 different types of human non-neoplastic gastrointestinal neuroendocrine cells

Hirofumi Watanabe, Fumiyoshi Fujishima, Michiaki Unno, Hironobu Sasano et autres

jp (code pays fourni par la source)