Fig. 3

The hematoxylin and eosin staining view of the lesion. a Variable-sized woven bone was observed with a cholesterol cleft appearance under low magnification (bar 100 µm). b Under high magnification, the marrow stromal tissue was diffusely fibrosed and filled with fatty bubble-like materials, accompanied by the infiltration of many macrophages (bar 20 µm). c There also appeared to be several foci of the cholesterol slits (bar 50 µm). d The stromal fibrosis increased in the absence of vascular channels and advanced to the osteolytic trabecular bones, which showed irregular and rudimentary bony trabeculae with no signs of osteoid deposition (bar 50 µm)