Fig. 2

Histological and pathologic findings. An integrated mass with complete ossification on one side. Ventral (A) and dorsal (B) surfaces of the mass. Histological image (H&E, × 100) of intramedullary spinal cavernous malformations (C) showing the bone tissue (red arrow) and bone marrow with adipose metaplasia, marginal hyperplasia of hyaline cartilage (blue arrow). A small amount of glial tissue, collagen fibers, and blood vessels with hyaline degeneration of the vascular wall (D)