Figure 4

The morphological characteristics of osseous metaplasia nodules of the submucosa (A,B) and mesosalpinx (C,D). Sections were routinely stained with hematoxylin and eosin (HE). The low-power view shows a well-circumscribed nodule composed of peripheral lobules of mature hyaline cartilage (magnification × 25). The high-power view shows benign-appearing chondrocytes without atypia, and trabecular bone formation (magnification × 100).