Sections reveal focally ulcerated surface epithelium with related infiltrating carcinoma characterized by irregular nests of malignant squamous cells showing focal keratinization, and moderate nuclear pleomorphism with active mitosis. Separating stroma shows dense lymphoplasmacytic infiltrate. Anaplasia is moderate and mitosis is focally active. Lymphovascular invasion and perineural permeation are not identified.
Tongue mass.
Soft tissue fragment measured 0.8x0.6x0.4 cm, totally embedded.
Tongue mass, incision biopsy: