X-rays<unk> s are found incidentally on X-rays. About 90 to 95% of the lesion is found in metaphysics of long bones. The cyst is centered, oblong in shape along the long axis of a long bone. Rarely, they are large and multicameral and are found in diaphysis. When fracture is present, there may be a small bone fragment migrated in the cystic fluid. This is called "fallen fragment sign" which is diagnostic of<unk> . Besides, a bubble migrating upwards (known as "rising bubble sign") is another feature suggesting of<unk> . Computerized tomography (CT) Scan CT scan shows a thin-walled lesion with pseudo septum (incomplete septum or a septum with perforations that allows communications between two chambers). CT scan is used to assess cyst wall thickness and risk of fracture. Magnetic Resonance Imaging (MRI) Magnetic resonance imaging scans are used to identify the precise location of the cyst, to see how aggressive the disease is, and to determine the actual shape and size. The MRI uses a combination of magnets and radio-frequencies to produce various detailed, computerized images of the cyst and its surrounding body structures. Bone scans a nuclear imaging method to evaluate any degenerative and/or arthritic changes in the joints; to detect bone diseases and tumors; to determine the cause of bone pain or inflammation. This test is to rule out other cysts (which are quite unusual)
Unicameral bone cyst
Bone cyst
Peripheral ossifying fibroma
Aneurysmal bone cyst
Osteoid osteoma
Leri pleonosteosis
Osteoma cutis
Osteochondroma