Figure 1.

Pathological Response Patterns Following Neoadjuvant Chemoradiotherapy. (A) No/minimal tumor regression, vital tumor cells, and prominent keratin pearls; (B) Tumor fragmentation with increased amount of fibrous connective tissue with scattered groups of vital tumor cells; (C) Tumor shrinkage with a solitary group of vital tumor cells embedded in fibrous connective tissue; (D) Complete response with no vital tumor cells within fibrous connective tissue; salivary glands, and skeletal muscles located on the right.