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Colloidal accumulations in the pars distalis of helmet guinea fowls at various ages from 1 to 450 days were examined by Periodic acid-Schiff reaction, immunohistochemistry and electron microscopy. Round, ovoid and elongated colloids were observed. Colloids (69.5 ± 2.997) with 0.169 ± 0.014 µm mean diameter were already present in a 1-day-old bird. Numerous colloids were encountered in 450 days old...
Pituitary adenomas originating in adenohypophysial cells represent the most common neoplasms of the sella turcica. The pathologist’s goal is the optimal diagnosis and classification of pituitary adenomas. Lack of clinicopathological correlations in the past classification of pituitary adenomas, which was based on the tinctorial properties of adenoma cells, limited the importance of histological diagnosis...
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