Since ETPs showed the potential to give rise to myeloid cell types, the team also asked whether some of the myeloid cells in the thymus normally arise from ETPs. 鉴于早期胸腺细胞表现出具有生成髓系细胞的能力，小组提出，是不是胸腺内的一些髓细胞通常来源于这些细胞。
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。
