Figure 1.

The chief cells of an adenoma (A) have an amphophilic, vacuolated cytoplasm, which on electron microscopic examination is composed of sparse mitochondria and the usual organelles associated with protein synthesis and secretion, glycogen and lipid [30]. Typical oxyphil cell adenoma (B) composed of large cells with a brightly eosinophilic granular cytoplasm, which on electron microscopic examination consists of densely packed mitochondria. The bar represents 1 mm.