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Kei Yamaguchi
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Journal Articles

Acquired Treatment Resistance in a Patient with Metastatic PD-L1-Positive Breast Cancer and Germline BRCA1 Mutation

Open Access
Subject Area:
Oncology
Toko Kumeta, Kei Yamaguchi, Ryosuke Hayami, Kazumori Arai, Michiko Tsuneizumi, Ryoichi Matsunuma
Journal: Case Reports in Oncology
Case Rep Oncol (2023) 16 (1): 550–557.
https://doi.org/10.1159/000530131
Published Online: 14 July 2023
View articletitled, Acquired Treatment Resistance in a Patient with Metastatic PD-L1-Positive Breast Cancer and Germline BRCA1 Mutation
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Journal Articles

Enrichment of Immune-Related Genes in Aggressive Primary Breast Angiosarcoma: A Case Report

Open Access
Subject Area:
Topic Article Package: ADC (Antibody-Drug Conjugates) , Oncology
Ryoichi Matsunuma, Shoko Sato, Jason Yongsheng Chan, Kazuo Kinoshita, Keisei Taku, Kei Yamaguchi, Ryosuke Hayami, Kazumori Arai, Makoto Suzuki, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2023) 16 (1): 461–470.
https://doi.org/10.1159/000531490
Published Online: 03 July 2023
View articletitled, Enrichment of Immune-Related Genes in Aggressive Primary Breast Angiosarcoma: A Case Report
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Journal Articles

Pathological Complete Response to Neoadjuvant Chemotherapy in a Patient with HER2-Positive Squamous Cell Carcinoma of the Breast

Open Access
Subject Area:
Oncology
Yuki Usui, Ryoichi Matsunuma, Kei Yamaguchi, Ryosuke Hayami, Aya Muramatsu, Makoto Suzuki, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2022) 14 (3): 1536–1541.
https://doi.org/10.1159/000519746
Published Online: 22 October 2021
View articletitled, Pathological Complete Response to Neoadjuvant Chemotherapy in a Patient with HER2-Positive Squamous Cell Carcinoma of the Breast
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Journal Articles

Large Breast Tumor Ulceration and Quality of Life in an 80-Year-Old Woman

Open Access
Subject Area:
Oncology
Kei Yamaguchi, Ryoichi Matsunuma, Ryosuke Hayami, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2021) 14 (1): 580–584.
https://doi.org/10.1159/000514980
Published Online: 23 March 2021
View articletitled, Large Breast Tumor Ulceration and Quality of Life in an 80-Year-Old Woman
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Journal Articles

Concurrent Bowen’s Disease of the Nipple and Breast Cancer

Open Access
Subject Area:
Oncology
Kei Yamaguchi, Ryoichi Matsunuma, Toko Kumeta, Sae Imada, Ryosuke Hayami, Kazumori Arai, Makoto Suzuki, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2021) 13 (3): 1410–1414.
https://doi.org/10.1159/000511565
Published Online: 30 November 2020
View articletitled, Concurrent Bowen’s Disease of the Nipple and Breast Cancer
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Journal Articles

Pneumocystis Pneumonia and Acute Kidney Injury Induced by Everolimus Treatment in a Patient with Metastatic Breast Cancer

Open Access
Subject Area:
Oncology
Mayuko Nakamura, Ryoichi Matsunuma, Kei Yamaguchi, Ryosuke Hayami, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2020) 13 (1): 170–175.
https://doi.org/10.1159/000505909
Published Online: 18 February 2020
View articletitled, Pneumocystis Pneumonia and Acute Kidney Injury Induced by Everolimus Treatment in a Patient with Metastatic Breast Cancer
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Journal Articles

Response of Estrogen-Receptor-Positive Metastatic Breast Cancer to Olaparib in Late-Line Therapy

Open Access
Subject Area:
Oncology
Toko Kumeta, Ryoichi Matsunuma, Kei Yamaguchi, Ryosuke Hayami, Michiko Tsuneizumi
Journal: Case Reports in Oncology
Case Rep Oncol (2020) 12 (3): 814–819.
https://doi.org/10.1159/000503858
Published Online: 29 October 2019
View articletitled, Response of Estrogen-Receptor-Positive Metastatic Breast Cancer to Olaparib in Late-Line Therapy
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Journal Articles

Successful Treatment of Sudden Hepatitis Induced by Long-Term Nivolumab Administration

Open Access
Subject Area:
Oncology
Keisuke Imafuku, Koji Yoshino, Kei Yamaguchi, Satoshi Tsuboi, Kuniaki Ohara, Hiroo Hata
Journal: Case Reports in Oncology
Case Rep Oncol (2017) 10 (1): 368–371.
https://doi.org/10.1159/000471480
Published Online: 24 April 2017
View articletitled, Successful Treatment of Sudden Hepatitis Induced by Long-Term Nivolumab Administration
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Journal Articles

Two Cases of Nivolumab Re-Administration after Pneumonitis as Immune-Related Adverse Events

Open Access
Subject Area:
Oncology
Keisuke Imafuku, Koji Yoshino, Kei Yamaguchi, Satoshi Tsuboi, Kuniaki Ohara, Hiroo Hata
Journal: Case Reports in Oncology
Case Rep Oncol (2017) 10 (1): 296–300.
https://doi.org/10.1159/000463379
Published Online: 04 April 2017
View articletitled, Two Cases of Nivolumab Re-Administration after Pneumonitis as Immune-Related Adverse Events
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Journal Articles

Sudden Onset of Brain Metastasis despite the Use of Vemurafenib for Another Metastatic Lesion in Malignant Melanoma Patients

Open Access
Subject Area:
Oncology
Keisuke Imafuku, Koji Yoshino, Kei Yamaguchi, Satoshi Tsuboi, Kuniaki Ohara, Hiroo Hata
Journal: Case Reports in Oncology
Case Rep Oncol (2017) 10 (1): 290–295.
https://doi.org/10.1159/000461576
Published Online: 04 April 2017
View articletitled, Sudden Onset of Brain Metastasis despite the Use of Vemurafenib for Another Metastatic Lesion in Malignant Melanoma Patients
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