Abstract
Summary
Methylcholanthrene pellets implanted into the thymus gland of young guinea pigs induced hyperplasia of Hassall's bodies and of the thymic reticulum near the pellet, squamous epithelialization of the pellet space, small epithelial cysts, and degeneration of the small thymocytes. These new epithelia show intercellular bridges and keratohyaline formation, and since they arise from Hassall's bodies they show the epithelial nature of the latter.
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