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This publication provides a standardized nomenclature for classifying microscopic lesions in laboratory rat and mouse skin, aiming to harmonize international toxicological research.

In this study, prolonged high-dose steroid treatment in rats caused several pathological changes, some of which regressed, particularly improvements in mammary gland tumors and pituitary-related symptoms, after stopping treatment.

This review discusses the function and pathology of hair follicles and highlights the potential of using dogs as a model to study human hair and stem cell disorders, but presents no new experimental results.

This study found that none of the nine minoxidil-treated autopsy cases showed cardiac pathology attributable to minoxidil, suggesting no direct link between the drug and specific human cardiac lesions.

This review outlines the histological structures of the skin, highlighting species and regional differences in dermal absorption and obstacles encountered in toxicological assessments due to epidermal thickness variability, contact dermatitis reactions, and stem cell vulnerabilities.