Figure 3

Serial face-reverse consecutive sections of a hyperplastic alveolar NEB (asterisks) of a silica treated rat at 17 months. A, CGRP immunostaining labels the endocrine cells of the hyperplastic NEB. These hyperplastic cells are also positive for PAMP (B) and PAM (C). D, Immunostaining for AM is negative. Magnification, ×500.