Thymus bldies prominently increased in quantity. 胸腺小体数量增多。
The thymus has no obvious demarcation into an outer cortex and inner cortex.Lymphocytes and the macrophages are dispersed in the thymus parenchyma equably. 牙鲆胸腺没有明显的外区和内区之分,胸腺细胞和巨噬细胞比较均匀地分布于整个组织中,未能观察到胸腺小体。