Figure 4From: Extra-osseous osteochondroma-like soft tissue mass of the patello-femoral space A. Macroscopic appearance of the tumor; B. Histopathology appearance (Haematoxylin-Eosin). A cap of mature hyaline cartilaginous tissue was covered by a fibrous membrane. The centre of the lesion is composed of mature bone trabeculae located beneath the cartilaginous cap, and containing bone marrow and amorphous calcified debris. Original magnification: ×10.Back to article page