日馬弘貴 (Hiroki Kusama) - マイポータル

Evaluating the quality of Japanese YouTube videos on breast cancer treatment using PRHISM: comparison by source credibility

Hiroki Kusama, Yoshimitsu Takahashi, Shunichiro Orihara, Kayo Adachi, Yumiko Ishizuka, Ryoko Semba, Hidetaka Shima, Yoshiya Horimoto, Hiroshi Kaise, Masataka Taguri …

Breast Cancer 2026年1月

Bridging across the pacific: overview of the 33rd annual meeting of the Japanese breast cancer society

Hiroki Kusama, Yoshiya Horimoto, Kayo Adachi, Yoichi Koyama, Kyoko Orimoto, Takahiko Kawate, Fuyo Kimura, Takako Komiya, Hiroshi Kaise, Kimito Yamada …

Breast Cancer 2025年12月29日

Clinical Relevance of Human Epidermal Growth Factor Receptor 2 Mutations in Human Epidermal Growth Factor Receptor 2–Low Metastatic Breast Cancer: Real-World Analysis of Trastuzumab Deruxtecan

Yoshiya Horimoto, Masanori Oshi, Akimitsu Yamada, Masako Muguruma, Yuko Ueki, Ryoko Semba, Hiroko Onagi, Rongrong Wu, Hiroki Kusama, Takahiko Kawate …

JCO Oncology Advances 2025年12月

Assessing the Reliability and Validity of Principles for Health-Related Information on Social Media (PRHISM) for Evaluating Breast Cancer Treatment Videos on YouTube: Instrument Validation Study.

Hiroki Kusama, Yoshimitsu Takahashi, Shunichiro Orihara, Kayo Adachi, Yumiko Ishizuka, Ryoko Semba, Hidetaka Shima, Yoshiya Horimoto, Hiroshi Kaise, Masataka Taguri …

JMIR infodemiology 5 e66416 2025年6月11日

Should All Low-Grade Ductal Carcinoma In Situ Be Excised? Implications and Challenges of the COMET Trial.

Hiroki Kusama, Yoshiya Horimoto, Kazuaki Takabe, Takashi Ishikawa

World journal of oncology 16(2) 239-241 2025年4月

Risk of febrile neutropenia in breast cancer chemotherapy despite the prophylactic use of pegfilgrastim: A Retrospective Analysis

Hiroki Kusama, Yoshiya Horimoto, Tomoka Ushio, Kyoko Orimoto, Takashi Ishikawa

2025年3月11日

Occult Breast Cancer Diagnosed from a Solitary Scalp Metastasis without Axillary Lymph Node Involvement: A Case Report

Tomoka Ushio, Saeko Teraoka, Yoshiya Horimoto, Hiroki Kusama, Yuji Sugiyama, Takashi Ishikawa, Masahiko Kuroda, Shingo Ikeda

Surgical Case Reports 2025年

A Case of Occult Breast Cancer Diagnosed during Immune Checkpoint Inhibitor Treatment for Recurrent Metastatic Lung Cancer

Mio Makino, Hiroki Kusama, Masaru Hagiwara, Yoshiya Horimoto, Eiichi Sato, Norihiko Ikeda, Takashi Ishikawa

Surgical Case Reports 2025年

[A Case of Chronic Expanding Hematoma of the Lower Abdomen after Reconstruction of Deep Inferior Epigastric Perforator Flap for Breast Cancer].

Satomi Nakajima, Nobuyoshi Kittaka, Azusa Taniguchi, Haruka Kanaoka, Yuri Oyama, Yukiko Seto, Ai Soma, Jun Okuno, Hiroki Kusama, Saki Matsui …

Gan to kagaku ryoho. Cancer & chemotherapy 50(13) 1680-1682 2023年12月

Predictive factors for response to neoadjuvant chemotherapy: inflammatory and immune markers in triple-negative breast cancer.

Hiroki Kusama, Nobuyoshi Kittaka, Ai Soma, Azusa Taniguchi, Haruka Kanaoka, Satomi Nakajima, Yuri Oyama, Yukiko Seto, Jun Okuno, Noriyuki Watanabe …

Breast cancer (Tokyo, Japan) 30(6) 1085-1093 2023年11月

Treatment with trastuzumab deruxtecan in patients with HER2-positive breast cancer and brain metastases and/or leptomeningeal disease (ROSET-BM).

Naoki Niikura, Takashi Yamanaka, Hironori Nomura, Kazuhiro Shiraishi, Hiroki Kusama, Mitsugu Yamamoto, Kazuo Matsuura, Kenichi Inoue, Sachiko Takahara, Shosuke Kita …

NPJ breast cancer 9(1) 82-82 2023年10月11日

Risk of Abemaciclib-induced Liver Injury in Hormone Receptor-positive, HER2-negative Metastatic Breast Cancer: A Retrospective Analysis.

Azusa Taniguchi, Nobuyoshi Kittaka, Haruka Kanaoka, Satomi Nakajima, Yuri Oyama, Yukiko Seto, A I Soma, Hiroki Kusama, Noriyuki Watanabe, Saki Matsui …

Anticancer research 42(12) 6027-6035 2022年12月

Pegfilgrastim-induced vasculitis of the subclavian and basilar artery complicated by subarachnoid hemorrhage in a breast cancer patient: a case report and review of the literature.

Yukiko Seto, Nobuyoshi Kittaka, Azusa Taniguchi, Haruka Kanaoka, Satomi Nakajima, Yuri Oyama, Hiroki Kusama, Noriyuki Watanabe, Saki Matsui, Minako Nishio …

Surgical case reports 8(1) 155-155 2022年8月12日

A Comparison of the Oncological Outcomes After Breast-Conserving Surgery With or Without Latissimus Dorsi Myocutaneous Flap Reconstruction for Breast Cancer.

Ryu Tokui, Makoto Ishitobi, Tomoyuki Kurita, Takaaki Hatano, Mariko Maekawa, Hiroki Kusama, Saki Matsui, Nobuyoshi Kittaka, Yasuhiro Tamaki, Takahiro Nakayama

Clinical breast cancer 22(2) e184-e190 2022年2月

[Primary Rhabdomyosarcoma of the Breast in a 16-Year-Old Girl].

Mariko Maekawa, Nobuyoshi Kittaka, Takaaki Hatano, Ryu Tokui, Hiroki Kusama, Saki Matsui, Minako Nishio, Fumie Fujisawa, Keiichiro Honma, Takahiro Nakayama …

Gan to kagaku ryoho. Cancer & chemotherapy 48(13) 2030-2032 2021年12月

Axillary management based on American college of surgeons oncology group Z0011 criteria makes it possible to omit intraoperative diagnosis of sentinel lymph nodes in early breast cancer patients.

Nobuyoshi Kittaka, Satomi Nakajima, Takaaki Hatano, Yukiko Seto, Hiroki Kusama, Saki Matsui, Minako Nishio, Fumie Fujisawa, Keiichiro Honma, Takahiro Nakayama …

The breast journal 27(11) 804-810 2021年11月

α-Methylacyl-CoA racemase: a useful immunohistochemical marker of breast carcinoma with apocrine differentiation.

Harumi Nakamura, Yoji Kukita, Kei Kunimasa, Nobuyoshi Kittaka, Hiroki Kusama, Takahiro Nakayama, Yasuhiro Tamaki, Ryoko Sugiura, Hidemitsu Yasuda, Masanori Hashimoto …

Human pathology 116 39-48 2021年10月

STK11 loss drives rapid progression in a breast cancer patient resulting in pulmonary tumor thrombotic microangiopathy.

Fumie Fujisawa, Kei Kunimasa, Rieko Kano-Fujiwara, Yoshiharu Sato, Hiroki Kusama, Minako Nishio, Saki Matsui, Tetsuhiro Yoshinami, Nobuyoshi Kittaka, Harumi Nakamura …

Breast cancer (Tokyo, Japan) 28(3) 765-771 2021年5月

Prevalence of BRCA1 and BRCA2 mutations in Japanese patients with triple-negative breast cancer: A single institute retrospective study.

Fumie Fujisawa, Yasuhiro Tamaki, Tazuko Inoue, Takahiro Nakayama, Toshinari Yagi, Nobuyoshi Kittaka, Tetsuhiro Yoshinami, Minako Nishio, Saki Matsui, Hiroki Kusama …

Molecular and clinical oncology 14(5) 96-96 2021年5月

Prognostic value of tumor cell DNA content determined by flow cytometry using formalin-fixed paraffin-embedded breast cancer tissues.

Hiroki Kusama, Masafumi Shimoda, Tomohiro Miyake, Tomonori Tanei, Naofumi Kagara, Yasuto Naoi, Kenzo Shimazu, Seung Jin Kim, Shinzaburo Noguchi

Breast cancer research and treatment 176(1) 75-85 2019年7月

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