Fibroblasts are mesenchymal cells which are derived from the embryonic mesoderm.
2
横纹肌肉瘤是起源于原始胚胎间叶细胞的一种软组织恶性肿瘤。
Rhabdomyosarcoma a is a soft tissue neoplasm arising from primitive embryonal mesenchyma.
3
组织细胞样细胞可演变为泡沫细胞和多核、单核的瘤巨细胞，另见少量未分化间叶细胞。
The histiocyte-like ce- lls may be transformed into foamy cells, mononucleated or multinucleated tumor giant cells. Undifferentiated mesenchymal cells were rarely seen.
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