Fig. 3
From: The surgical plane for lingual tonsillectomy: an anatomic study
Permanent sections of base of tongue biopsies with premalignant pathology. Blue line demarcates surgical plane. Lingual tonsils (LT), minor salivary gland tissue (MS), muscle (MU) are labeled. Plane ispreserved in the presence of dysplasia in a and b (most defined plane). However, peritumoral lymphocytes infiltrate obscure the space between the lingual tonsil and the underlying muscle in c