<unk> s are often asymptomatic and may not cause any kind of discomfort. They are often found accidentally when an X-ray is done for an unrelated reason. * X-rays are the first tests performed that characterize a lesion. They show a clear picture of dense structures of bones, and will also indicate bone growth pertaining to<unk> . * Computed tomography (CT) scan can identify the bony lesion in great details and show the presence of calcification. These tests also provide great details, especially in soft tissues with the aide of cross-sectional images. * Magnetic resonance imaging (MRI) is the most accurate method for detecting bone masses in symptomatic cases to depict precise morphology of a tumor. It is used to verify if the palpable mass is continuous with the cortex of the affected bone and to differentiate an<unk>  from other lesions on the surface of the bone. MRI can also be used to look for cartilage on the surface of tumor and can depict any vascular complications caused by the tumor. An MRI can identify tumors of the spinal column and is often used to diagnose low grade osteosarcoma. * Ultrasound is done if aneurysms or pseudoaneurysms and venous or arterial thrombosis is suspected. Ultrasound is an accurate method for examining the cartilaginous cap of the<unk> . It is also a way of pinpointing bursitis. However, it cannot be used to predict if the growth of tumor is inward in regards to the cap. * Angiography is used to detect vascular lesions caused by<unk>  due to ossified cartilaginous cap. It is also used to characterize malignant transformation lesions through neovascularity. * Clinical testing such as sequence analysis can be done of the entire coding regions of both EXT1 and EXT2 to detect mutations. * A biopsy of the tissue sample of the tumor can also be taken to check for cancer. Tests for<unk>  can also identify diseases such as secondary peripheral chondrosarcoma and multiple<unk> tosis. In large, secondary chondrosarcoma arises at the site of<unk>  due to increased thickness of the cartilage cap indicating potential malignant transformation. The symptoms of multiple<unk> tosis are similar to solitary<unk> , but they are often more severe. Painless bumps can arise at the site of tumor and pain and other discomforts can also take place if pressure is put on the soft tissues, nerves, or blood vessels. Dysplasia Epiphysealis Hemimelica (DEH) or Trevor's disease and metachondromatosis (MC) are considered differential diagnosis of both solitary and hereditary<unk> s. DEH is described as a type of over growth at one or more epiphyses. Similar to<unk> , DEH is diagnosed prior to 15 years of age and the growth of lesions end at puberty, when the growth plates close. Metachondromatosis is a rare disorder that exhibit symptoms of both multiple<unk> s and enchondromas in children and is also inherited in autosomal dominant mode. A type that contains fat is known as an osteolipochondroma (osteo, bone, lipos, fat, + chondros, cartilage, oma, tumor).
Osteochondroma
Osteochondrosis
Bone cyst
Osteoma
Osteoblastoma
Osteoid osteoma
Osteosarcoma
Synovial sarcoma