Polymorphous Low-Grade Adenocarcinoma of the Tongue Base Treated by Transoral Robotic Surgery

Figure 2

Histologic findings of the tumor. Low-power magnification view, hematoxylin and eosin staining, ×10, showed a well-circumscribed, but not encapsulated, mass with a variety of different growth patterns (a). Variable architectures were seen within tumor tissue, including tubular, trabecular, and cribriform growth patterns, hematoxylin and eosin staining ×100. The tumor cells were small-to-medium sized and uniform in shape (b). The nuclei of the tumor cells were round to oval, with vesicular pale nuclear chromatin and small nucleoli. The mitotic figures were inconspicuous, hematoxylin and eosin staining ×400 (c).

(a)

(b)

(c)