Fig. 1.

Scanned histological sections of parotid PAs. a Bosselated, circumscribed, solid tumor with an equal epithelial (E): stromal (S) ratio, which is incompletely surrounded by capsule (C). b Largely cystic tumor divided in two; the arrow indicates a typical area. c Multinodular, recurrent tumor; while most of the nodules are stroma-rich and myxoid (asterisk), other are cell-rich and of a monomorphic appearance (arrow) (Unless otherwise specified, the pictures are from sections stained with hematoxylin and eosin. Zooming on the electronic format of the picture would allow appreciation of detail difficult to be seen in print)