Summary of histopathological findings in <i>TgK19GT₁₂₁; β-actin Cre</i> and <i>TgK18GT₁₂₁; β-actin Cre</i> mice.

*<p>Average age of <i>TgK19GT₁₂₁; β-actin Cre</i> mice analyzed here was 123 days (2–6 months, mainly line 43) and <i>TgK18GT₁₂₁; β-actin Cre</i> mice 130 days (1–6 months, both lines). Three <i>TgK19GT₁₂₁; β-actin Cre</i> mice were euthanized due to kidney hydronephrosis at 2 months of age. All <i>TgK18GT₁₂₁; β-actin Cre</i> mice were euthanized due to thymic masses at 1–6 months of age.</p>†<p>The onset and extent of lesions were different between <i>TgK19GT₁₂₁; β-actin Cre</i> and <i>TgK18GT₁₂₁; β-actin Cre</i> mice (see text for details).</p>#<p>multifocal hyperplasia. m: male; f: female; N.D.: not determined.