Explanipedia

Primary Non-Hodgkin Lymphoma of the Liver and Gallbladder Diagnosed by Laparoscopic Segment 8 Subsegmentectomy and Cholecystectomy: A Rare Case Report Open

Toshikatsu Nitta, Masatsugu Ishii, Masataka Taki, Ryutaro Kubo, Akitada Sada , et al. · 2025

A 71-year-old Japanese woman presented to our hospital to consult for a gallbladder polyp detected on a routine ultrasound in 2024. We found a sized-up gallbladder polyp and a liver tumor. She underwent laparoscopic segment 8 subsegmentect…

A Case of Omental Neuroendocrine Tumor Discovered Incidentally: Case Report Open

Masataka Taki, Toshikatsu Nitta, Ryutaro Kubo, Aki Yoshiyama, Hideo Yoshimoto , et al. · 2025

Neuroendocrine cells are distributed throughout the body’s organs, though neuroendocrine neoplasms are primarily documented in the gastrointestinal tract and pancreas, with rare occurrences elsewhere. Herein, we report a case of primary ne…

A case of eosinophilic cholecystitis: Radiologic-pathologic correlation Open

Kiyohito Yamamoto, Kazuhiro Yamamoto, Atsushi Takeshita, Koji Komeda, Akira Imoto , et al. · 2024

Eosinophilic cholecystitis (EC) is a rare condition that is characterized by eosinophilic infiltration in the gallbladder wall. We report the case of a 35-year-old woman who presented with unremitting right upper quadrant pain for 1 month.…

Multiple calcifying fibrous tumors from gastric and retroperitoneal tissue: A case report Open

Masatsugu Ishii, Toshikatsu Nitta, Masataka Taki, Ryutaro Kubo, Atsushi Takeshita , et al. · 2024

Laparoscopic splenectomy for sclerosing angiomatoid nodular transformation of the spleen: Report a case Open

Toshikatsu Nitta, Kohei Horiguchi, Masatsugu Ishii, Masataka Taki, Ryutaro Kubo , et al. · 2024

A Case of Benign Multicystic Peritoneal Mesothelioma Arising in the Paracolon Open

Masataka Taki, Toshikatsu Nitta, Kohei Horiguchi, Sadakatsu Senpuku, Yasuhiko Ueda , et al. · 2024

Primary hepatic lymphoma diagnosed with diffuse large B cell lymphoma originating from a germinal center B cell Open

Hideko Ohama, Hiroki Nishikawa, Kosuke Ushiro, Masahiro Matsui, Tomohiro Nishikawa , et al. · 2022

症例は70代女性．食思不振と全身倦怠感を主訴に近医を受診し，CTで肝腫瘤を認め当院紹介となった．血液検査で肝障害を認め，肝炎ウイルスは陰性であった．AFP，PIVKA-II，CEA，CA19-9は陰性で可溶性IL-2受容体は著明に上昇していた．造影CT検査で肝右葉を占拠する巨大な低吸収腫瘤を認めた．肝腫瘤生検にて高度の挫滅を伴う裸核状の細胞を認め，免疫染色でLCA，CD20，CD79aは陽性，CD3，AE1/AE3は陰性で，CD10，MUM-1陰性，Bcl-6陽性のため，び…

Case report of a Japanese patient with chronic renal failure who developed <span>SARS‐CoV</span> ‐2 in a hospital cluster during treatment for acute respiratory failure: An autopsy report Open

Yoshifumi Amari, Satoshi Morimoto, T. Teranishi, Mai Ohata, Atsushi Takeshita , et al. · 2022

This article reports a clinical and histopathological perspective which noted not only COVID‐19 pneumonia but also exacerbation of chronic renal failure potentially caused by thrombus in the kidney, possibly COVID‐19‐related lesions. The a…

Granular cell tumor coexisting with adenocarcinoma in the stomach: Report of a rare case Open

Toshikatsu Nitta, Masato Ohta, Jun Kataoka, Masatsugu Ishii, Yasuhiko Ueda , et al. · 2021

We believe that the coexistence of a GCT and gastric cancer in our patient was accidental and that there was no relation between them.

Total pancreatectomy for pancreatic remnant carcinoma five years after pancreaticoduodenectomy: Report a case Open

Jun Kataoka, Toshikatsu Nitta, Masato Ota, Kensuke Fujii, Atsushi Takeshita , et al. · 2021

Collision Tumor Comprising Primary Malignant Lymphoma and Adenocarcinoma in the Ascending Colon Open

Jun Kataoka, Toshikatsu Nitta, Masato Ota, Kensuke Fujii, Masatsugu Ishii , et al. · 2021

We describe the case of a 78-year-old man with collision tumor from the primary malignant lymphoma and adenocarcinoma in the ascending colon. He suffered anemia from sigmoid colon cancer, and colonoscopy revealed early-stage colorectal can…

Resection of Liver Metastasis from Gastric Neuroendocrine Cell Carcinoma—Report of a Case— Open

Jun Kataoka, Toshikatsu Nitta, Sadakatsu Senpuku, Yasuhiko Ueda, Masatsugu Ishii , et al. · 2021

症例は61歳，男性．進行胃癌［cT4a （SE） N2M0;cStage III］に対し，幽門側胃切除切除術（D2郭清）を施行した．病理学的検査では低分化型腺癌であったため，術後補助化学療法としてS－1を開始した．しかし，術後3カ月目に肝転移を認め，転移巣は肝のみであったため患者・家族と十分な協議の上，外科的切除の方針とし，肝右葉切除を施行した．臨床経過も踏まえ，免疫染色を含む病理学的検査を原発巣・転移巣に施行したところ，胃神経内分泌細胞癌と診断した．退院後，CPT-11+…

An Adenoma of the Appendix Detected by Positive Findings on PET/CT Open

Toshikatsu Nitta, J. Kataoka, Masato Ohta, Kensuke Fujii, Masatsugu Ishii , et al. · 2020

症例は76歳の男性．直腸癌術後の術後フォローアップの経過観察のために，腹部造影CT検査を施行したところ，右下腹部の腹膜に不整形結節を指摘され，精査としてFDG-PET検査を追加したところ，虫垂の腫大と軽度の集積（SUV3.57）を認めた．

A Case of Therapy-related Myeloid Neoplasms (t-MNs) after Adjuvant Chemotherapy for Breast Cancer -a Summary Report of Therapy-related MNs after Treatment for Breast Cancer in Japan Open

Toshikatsu Nitta, Junichi Miyatake, Kousei Kimura, Ayana Ikari, Kensuke Fujii , et al. · 2020

症例は82歳の女性．5年前に左乳癌術後の補助化学療法としてEC4サイクル（epirubicin 100mg，cyclophosphamide 600mg），letrozole （2.5mg/day）を5年間，順次投与した．その後，全身倦怠感にて乳腺外来を受診し，採血結果より治療関連骨髄性腫瘍（therapy-related myeloid neoplasms:t-MNs）を疑い，当院血液内科に紹介受診となった．年齢的に強力な化学療法が困難であり，アザシチジン100mgの投与…

Laparoscopic Excisional Cholecystectomy with Full-Thickness Frozen Biopsy in Suspected Gallbladder Carcinoma Open

Toshikatsu Nitta, Jun Kataoka, Masato Ohta, Yuko Takashima, Kensuke Fujii , et al. · 2018

Owing to the advantages of a laparoscopic approach, laparoscopic cholecystectomy (LC) is thought to be the treatment of choice in gallbladder disease, even in cases of suspected malignancy. However, it is difficult to differentiate between…

Delta-like 3 is silenced by HBx via histone acetylation in HBV-associated HCCs Open

Hiroki Hamamoto, Kentaro Maemura, Kentaro Matsuo, Kohei Taniguchi, Yoshihisa Tanaka , et al. · 2018

Gallbladder Cancer Showing a Great Response to Paclitaxel Plus Carboplatin Chemotherapy: A Case Report Open

Yoshihiro Inoué, Masato Ota, Kensuke Fujii, Junna Matsuda, Nao Kawaguchi , et al. · 2017

Currently, complete surgical resection is the most effective and the only potentially curative treatment for gallbladder carcinoma (GBC). However, GBC frequently presents various manifestations as it progresses, including liver invasion, b…

A case of multiple inflammatory hepatic pseudotumor protruding from the liver surface after colonic cancer Open

Toshikatsu Nitta, Jun Kataoka, Yoshihiro Inoué, Kensuke Fujii, Masahito Ohta , et al. · 2017

Hepatectomy should be considered if the lesion is suspected to be an IHPT.

A Case of Encapsulated Hepatic Angiomyolipoma Open

Takafumi Shima, Yoshihiro Inoué, Mitsuhiro Asakuma, Fumitoshi Hirokawa, Hidetoshi Satomi , et al. · 2016

An Inflammatory Pseudotumor That Underwent Three Hepatectomies for Metastatic Liver Cancer Open

Hirofumi Ueda, Koji Komeda, Yoshihiro Inoué, Mitsuhiro Asakuma, Fumitoshi Hirokawa , et al. · 2016

症例は62歳の女性で，S状結腸癌術後，2010年1月，切除不能な多発肝転移を認め，化学療法を施行した．肝転移巣はpartial responseとなり，2011年4月，1回目の肝切除を施行した．その後2回の再発を来し，3回目の肝切除後，胆管狭窄による閉塞性黄疸を認めた．胆管ステントを留置し，直後は胆管炎を併発していた．胆管炎の頻度も低下してきた2012年7月，新たに肝S2に腫瘤を認めた．肝腫瘤は増大傾向を示したため肝転移再発と診断した．2012年10月，4回目の肝切除を施行…

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