Fig. 2
From: An unusual example of hereditary multiple exostoses: a case report and review of the literature
Right proximal femur. a Posterior view. A large exostosis (a) surrounding the metaphysis with an outgrowth (b) from the lateral portion of the femoral shaft. Greater trochanter (c) and femoral head also displayed (d). b A section through intramedullary mass. (a) Cartilage matrix (b) inter nodular cartilage. c A section through the surface of a sessile osteochondroma. (a) Perichondrium on surface of cartilage cap. (b) chondrocytes. (c) Hypertrophic mature chondrocytes. (d) Subchondral bone. d T2 MRI coronal section. Osteochondromas can be seen surrounding the metaphysis and extending from the diaphysis (a and b respectively). Cartilage caps can also be seen on the osteochondromas (c). A large fluid filled mass is present in the metaphysis (d). Large voids are present in both the epiphysis and diaphysis (e and f). e Transverse CT scan through greater trochanter (a). Showing osteochondroma (b). f Transverse CT scan through proximal diaphysis. The pedunculated osteochondroma (a) can be seen on the lateral surface whilst the sessile growth can be seen on the posterior diaphysis (b). g Coronal section. (a) Cross section of osteochondroma. (b) trabecular bone obliterating normal cortical bone as the medulla of the overlying exostosis. (c) Cortex of exostosis. (d) Soft mass located in the metaphysis. (e) An example of the gaps located within the trabecular bone. h Cartilaginous mass removed (a) surrounded by trabeculae (b)