Only 5% of serrated polyps are TSAs. They range from 9 to 14 mm in maximum dimension, endoscopically have a “pinecone-like” appearance and a proximal or distal location; the three histological hallmarks are: the slit-like serrations, the ectopic crypt foci and the eosinophilic cells with st...
Various experimental approaches indicated the nucleolus was the site of rRNA synthesis (for refs., see Abrams, 1961). Fitzgerald and Vinijchaikul used autoradiography to show 3H-cytidine uptake by pancreatic acinar cell nucleoli preceded the appearance of the label in the cytoplasm. When HeLa ...
We found that the harvested highly chemotactic cells main- tained their mesenchymal morphology, even after forming a colony over 4 days, while in comparison, the non-chemotactic cells remained tightly clustered and epithelial in appearance (Fig. 4 (A,B)). In the chemotactic colonies, all ...