Many non-neoplastic conditions of bone may clinically or radiologically mimic a solitary bone tumor. Unilocular bone cysts The simple unilocular bone cyst occurs in the long bones distal to the growth plate in children. The cyst causes a thinning of the cortex and predisposes the area for a belt-like pathologic fracture through which the cyst is usually discovered. X-ray plain films are usually conclusive. Simple unilocular bone cysts represent typically presents as well demarcated lesions without reactive sclerosis or a expansilen cortex represents. Cysts in size heal <5 cm and can disappear when the fracture heals. Cysts> 5 cm, v. a. in children, can excision or curettage and require bone grafting. However, many cysts also respond to the injection of corticosteroids, demineralized bone matrix or synthetic bone substitute. The reaction time may be variable and may require multiple injections. Regardless of the treatment, the cysts persist at about 10-15% of patients. Fibrous dysplasia Fibrous dysplasia is based on an abnormal bone development during childhood. It relates to one or more bones. Skin pigmentation and endocrine differences may be present (Albright syndrome). Usually stops the growth of bony lesions of fibrous dysplasia in adolescence. They rarely lead to malignant transformation. Radiographically, the lesions may appear cystic and expanded and deforming occur. In imaging studies, the lesions show the classic ground-glass appearance. Calcitonin provides relief from the pain. Progressive deformities, fractures that do not heal at immobilization, or even unbearable pain can be effectively treated by surgery. Aneurysmal bone cyst Aneurysmal bone cyst is an idiopathic expansile lesion, which usually develops before the age of 25. This cystic lesion usually arises in the metaphyseal region of long bones, but any bone can be affected. It grows slowly. Periosteal new bone sheath is formed around the expansile lesion and is often wider than the original bones. Pain and swelling are common. The change can be made before the diagnosis a few weeks to years. The appearance of the radiograph is often characteristic: the rarefied area is usually well defined, eccentric and expanded by periosteal proliferation into the surrounding soft tissues and surrounded by bone formation. The MRI typically shows fluid levels. In imaging studies some of aneurysmal bone cyst like lesions may appear threatening in that they have similar properties as osteosarcomas and should raise the suspicion of a telangiectatic osteosarcoma. Aneurysmal bone cyst MIKE DEVLIN / SCIENCE PHOTO LIBRARY var model = {thumbnailUrl: ‘/-/media/manual/professional/images/c0036331_aneurysmal_bone_cyst_x-ray_science_photo_library_high_de.jpg?la=de&thn=0&mw=350’ imageUrl: ‘/ – / media / manual /professional/images/c0036331_aneurysmal_bone_cyst_x-ray_science_photo_library_high_de.jpg?la=de&thn=0 ‘, title:’ aneurysmal bone cyst ‘, description:’ u003Ca id = “v37892998 ” class = “”anchor “” u003e u003c / a u003e u003cdiv class = “”para “” u003e u003cp u003eDie cyst is well defined

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