Sections reveal an infiltrating moderately differentiated (Grade 2) squamous cell carcinoma characterized by irregular nests of malignant squamous cells showing extensive keratinization, and mild nuclear pleomorphism with active mitosis. Separating stroma shows dense lymphoplasmacytic infiltrate.
Lip ulcer.
Soft tissue fragments collectively measured 1x0.8x0.6 cm, totally embedded.
Lip lesion, incisional biopsy: