Numerous pigment granules were observed in the macrophages of the spleen and lymph node. However, no phagocytosis of pigment granules was found in the palatine tonsil and thymus.

• 结果提示：四种淋巴器官中只见脾脏和淋巴结的吞噬细胞吞噬大量色素颗粒，而腭扁桃体则和胸腺一样，未见有吞噬血流和淋巴液中的异物的现象。