Fig. 4From: Successful conversion surgery following chemotherapy with an immune checkpoint inhibitor in an older adult patient with stage IVB esophageal squamous cell carcinoma: a case reportHistological findings. Macroscopically, an ulcerated scar measuring 18 × 5 mm at the site of the primary tumor is observed (a, b). Histological examination reveals no residual tumor (c, × 40) (d, × 100)Back to article page