Chondroma

Chondroma is a benign cartilaginous tumor, encapsulated, with a lobular growing pattern. Tumor cells (chondrocytes, cartilaginous cells) resemble normal cells and produce the cartilaginous matrix (amorphous, basophilic material). Characteristic are the vascular axes within the tumor, which make the distinction with normal hyaline cartilage. Photo at: Atlas of Pathology