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Surgical Case Reports
Fig. 4 | Surgical Case Reports

Fig. 4

From: Single-dose trastuzumab monotherapy achieved pathological complete response (pCR) in a patient with HER2-positive breast cancer: a case report

Fig. 4

Preoperative histopathological findings. A, B Atypical cells with a high degree of nuclear atypia proliferated in fullness with stromal fibrosis (hematoxylin and eosin [HE] stain). C–F Immunohistochemistry study for HER2 (C), estrogen receptor (ER) (D), progesterone receptor (PR) (E), and anti-Ki67 antibody (Ki67) (F). The original magnifying powers were as follows: (A) × 100, (B) × 400, (C) × 400, (D) × 200, (E) × 400, and (F) × 400

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