医生通过骨髓活检确认她患上了组织细胞增生症。

The doctor confirmed she had ___histiocytosis through a bone marrow biopsy.

这种罕见的组织细胞增多症会影响儿童的肝脏和脾脏。

This rare form of ___histiocytosis affects the liver and spleen in children.