Fig. 5
From: Spontaneous regression of breast cancer with immune response: a case report
Immunohistochemical staining for the primary breast cancer. Immunohistochemistry study for immunological surface markers (a CD3; b CD4; c CD8; d CD20; e CD56; f PD-L1. All original magnifications are × 200). Immunohistochemical staining for the primary breast cancer. CD3-positive (a), CD4-positive (b), and CD8-positive T-cells (c), aggregation of CD20-positive B-cells (d), and occasional CD56-positive NK cells are detected (e). Ductal carcinoma cells are immunonegative for PD-L1 (f)