Bone Cyst

Aneurysm bone cyst counts 5% of benign tumors, while those of the hand occupies 5% of bone tumors, aneurysms. The increased incidence for development of lesions is the second decade of life.These lesions shows the pain and rapid growth, especially during pregnancy. Typically occur in the metacarpal bones, followed by the phalange. Radiographic tumor cells are similar to giant soap bubble appearance without calcification.
Are lithic lesions, eccentric, expansion and sharp edges without marginal sclerosis. Curettage and bone grafting methods of treatment are historical only curettage is associated with high recurrence and complete excision with functional impotence. As adjuvant treatment modalities Cryosurgery or electric cauterization may be indicated with curettage, and complete excision reserved for recurrent cases.
Unicameral cyst is a benign lesion of uncertain etiology that occurs in the metaphyses of long bones. These injuries occur in childhood and affects males twice against women in the first two decades of life. Common location is the proximal humerus. These lesions are asymptomatic and is manifested by delayed pathologic fractures.
Radiographic unicameral cyst is a lithic lesion with well-defined edges and metaphysics or trabeculatie minor septa. Treatment is indicated to prevent pathological fractures and deformities.Treatment includes observation, injection of corticosteroids, curettage and bone grafting, bone marrow aspirate and excised en bloc. Cyst aspiration and corticosteroid injections have become popular due to low risk of complications.
Pathogenesis of bone cystUnicameral cyst:It is a benign lesion filled with fluid, which can occur virtually radiolucenta ROIC bone, but is found in the proximal humerus or femur. Injury leads to thinning of bone adjacent to fracture zones and pain by microfracture. When these lesions are adjacent to a growth plate are called active cysts, and he stood at a distance are considered dormant. This distinction has prognostic significance.A unicameral cyst presents unifocal, affecting skeletally immature patients.The rarity of lesions in adults supports the hypothesis of spontaneous resolution. In the absence of fracture in the cyst, they are asymptomatic. Treatment is indicated for lesions that cause bone fracture or loosening. There are cases of cysts developed chondrosarcoma of bone.The main etiological theory for the unicameral cyst interstitial fluid is blocking drainage area with rapid bone remodeling.Cyst aneurysm:Aneurysm bone cyst is a cystic lesion that affects patients in the second decade of life and can occur in any bone. Although benign locally aggressive and can cause extensive bone weakening. The etiology and pathophysiology remain a mystery. Recurrence is not common. It is considered a rare lesion, counts only 1-6% of bone lesions.True etiology is unknown. It is considered to be the result of vascular malformari bone. There are three proposed theories: cysts caused by a secondary reaction to another bony lesion formed de novo or in areas with a history of trauma. Theories differ on vascular malformations include arteriovenous fistulas and venous blockages. They increase the pressure, erosion and resorption of bone and tissue formation initiates local hemorrhage osteolytic reaction.
Signs and symptomsUnicameral cyst:The lesion occurs more frequently in children of 5-15 years. Cysts of the first decade of life are considered more aggressive. It affects men twice as often than women. Constitute 3% of bone tumor lesions. The most common location is the proximal humerus, followed by proximal femur.Most patients with unicameral cyst to the doctor after a pathological fracture. Such humerus or femur fractures affect.Events leading to fracture varies. In other situations, patients may present for other medical problems and is detected by X-ray injury.Stopping the growth occurs in 10% of patients. " The cause is uncertain but may be the result of fractures associated with the cyst, which alters the structure of bone by curettage or by direct extension of the cyst in the Fizeau plate epiphysis.Cyst aneurysm:
Aneurysm affect any bone cyst in the body, but more commonly the long bones, followed by spine and tubular plate. These three areas include over 80% of cysts.Patients experience pain, a tumor mass, swelling, pathological fracture or a combination of these symptoms in the affected area.Symptoms are usually present for several weeks before the month prior to diagnosis, and the patient has a history of rapidly progressive mass. Neurological symptoms associated with aneurysm cysts develop secondary pressure on a nerve. Fractures occurred in 50% of pathological lesions.
Other signs and symptoms include:-Local deformation, decrease range of motion, stiffness, weakness-Torticollis reagent, murmurs in the affected area-Local heat.