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16 May 2026 : Case report  Japan

Long-Term Response to Pembrolizumab in Metastatic Metaplastic Breast Carcinoma: A Case Report

Unusual clinical course, Unusual or unexpected effect of treatment

Yuki Oshima ABCDEF 1, Takamasa Suzuki D 1, Yumi Fukaya D 1, Keiko Hosoya D 1, Yuko Tanaka D 1, Makoto Wakahara ABCDEF 1*, Yoshihisa Umekita CD 2, Yugo Tanaka ABCDEF 1

DOI: 10.12659/AJCR.952330

Am J Case Rep 2026; 27:e952330

Authors information Article notes Copyright and License information

Figure 4 Immunohistochemical findings. The initial surgical specimen was PD-L1-positive with a combined positive score of 83.2% (using PD-L1 IHC 22C3 pharmDx) (×200).

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923