PURPOSE: To describe the MR findings of simple bone cyst. MATERIALS AND METHODS: We analyzed the signal intensity of the cystic contents, their margins, and internal septae, and the presence of bony fragment and pathologic fracture, and enhancement patterns in MRI of 10 pathologically confirmed simple bone cysts. RESULTS: On MR imaging, the cystic contents were of homogeneously low signal intensity on T1WI and high signal intensity on T2WI in nine cases and fluid-fluid level was seen in one case. The cystic margins were dark in all sequences. There were not any fragment in the cysts. Among the four cases with pathologic fracture, one case had fluid-fluid level and two had some areas of enhancement in the cyst or adjacent soft tissue. All nine cases with gadolinium enhancement showed thin rim enhancement along the inner margin of the cysts and internal septae. CONCLUSION: Homogeneous fluid-like signal intensity of cystic content and thin rim enhancement of margin and internal septae in MR imaging are believed to be helpful in the diagnosis of simple bone cyst.
Bone Cysts* ; Diagnosis ; Fractures, Spontaneous ; Gadolinium ; Magnetic Resonance Imaging

No abstract available.
Magnetic Resonance Imaging*

Ultrasonography is suited for screening patients with a mass in the soft tissue because of its safety, low cost, apparent sensitivity and non-invasiveness. But the application in orthopaedic surgery is insufficient. Authors examined 102 patients who had a palpable soft tissue mass of extremities and trunk with ultrasonography. Location, internal echogenicity, margin, and extent of soft tissue involvement, especially neurovascular bundle by tumor were evaluated. The diagnosis of mass was confirmed by histopathology after excision or biopsy of the mass. The ultrasonography correctly identified and differentiated the cystic lesions of 34 cases. The sonograms of all 16 malignant lesions showed ill-defined margin and heterogenous internal echo. The extent of soft tissue involvement, especially neurovascular bundle was confirmed exactly with ultrasonography. Therefore, in malignant tumor, after confirmation of no neurovascular involvemment with ultrasonography, limb-salvage operation could be considered and planned. In one case of abscess, percutaneous biopsy was done under guidance of ultrasonography. Therefore, ultrasonography can be used as a guide for percutaneous biopsy without exposure to radiation.
Abscess ; Biopsy ; Diagnosis ; Extremities ; Humans ; Mass Screening ; Ultrasonography

No abstract available in English.
Patella

Congenital Pseudarthrosis of the tibia is an uncommon condition and its exact etiology and pathogenesis remains unknown. Authors experienced two cases of congenital pseud arthrosis of the tibia.
Pseudarthrosis ; Tibia

Patients with severe acetabular bony deficiency in total hip revision arthroplasties need the use of autogenous or allogenic bone grafts. The Authors performed 28 cases of total hip revision arthroplasties between June 1991 and January 1995 with femoral head allograft for acetabular bony deficiencies and evaluated the clinical and radiological results according to AAOS classification. The clinical result was evaluated by D'Aubigne and Postel score. The mean score was improved from 3.9 points to 5.1 points at follow-up. In radiological evaluation, osseous union of graft was achieved within 12 month and rerevision were performed in two cases (92.8% survival rates) but radiological radiolucent line in at least one zone was seen in five hips in two year follow up. In conclusion, the results of hemispherical microporocoat cup with allogenic bone in segmental or cavitary defect using with acetabular reinforcement ring in combined deficiency were encouraging to date. Success rate of allograft reconsruction of the acetabulum results from a variety of acetabular defect. In our studies, only 40% showed stable bony fixation over short period.
Acetabulum* ; Allografts ; Arthroplasty ; Arthroplasty, Replacement, Hip* ; Classification ; Follow-Up Studies ; Head ; Hip ; Humans ; Transplants*

No abstract available.
Purpura, Schoenlein-Henoch* ; Streptococcal Infections*

Fractures of the tibial condyles, involving as they do weight-bearing articular surfaces and important soft tissues such as collateral ligaments, cruciate ligaments and semilunar cartilages present a variety of problems in treatment and prognosis. Apley, Slee, and others maintained the opinion that most fractures of the tibial condyles could be managed conservatively. On the other hand, Rombold, Schatzker, and others seemed to consider closed treatment to be virtually a form of therapeutic nihilism and adviced open reduction. But recently most authors agree that the method of treatment has to be selected in each individual case, and recommend anatomical reduction of the fracture as possible and early knee motion. During 7 years period from January 1974 to July 1981, of the tibial condylar fractures treated at the department of orthopaedic surgery, Han Gang Shim Hospital, 41 cases that could be followed have been analysed according to the cause, classification, method of treatment and result. The following results were obtained from the analysis of 41 tibial condylar fractures. l. Of the 41 cases, 34 (83%) were male and 7 (17%) were female. 2. Of the 41 cases, 32 (78%) were due to traffic accident, 25 pedestrian, 7 occupant, 8 (20%) were due to fall from height. 3. Of the 41 cases, 31 (76%) were associated with other injuries. 4. Of the 41 cases, 30 were treated by conservative method with functionally acceptable result in 22 cases (73%) and 11 were treated by open reduction with functionally acceptable result in 9 cases (82%). 5. According to the Hohl and Luck's criteria, acceptable functional result was obtained in 31 (76%) cases.
Accidents, Traffic ; Classification ; Clinical Study ; Collateral Ligaments ; Female ; Hand ; Humans ; Knee ; Ligaments ; Male ; Menisci, Tibial ; Methods ; Prognosis ; Weight-Bearing

The tibial plateau fracture is a fracture of the proximal end of the tibia, involving the articular surface and the supporting metaphysis of a major weight bearing joint. This fracture frequently accompanies soft tissue injury such as ligaments and menisci. So it often produces disability of the knee joint. Of the tibial plateau fractures which had been treated by open reductions at Keimyung University Hospital between May 1971 and December 1981, the 28 cases that were followed for 1 year to 3 years have been analysed according to its cause, classification, treatment and result. Open reduction is indicated in anyone with one or more of the following deformities as shown by roentgenograms: a compression greater than 6-8mm and a split greater than 5mm of the condyle. Anatomical considerations and a clinical end result study of the 28 fractures emphasize that the unacceptable results were from comminution of the fracture, associated soft tissue injury, osteoporosis, infection and other conditions that prevent early knee motion. Twenty-two cases (79 per cent) out of Twenty-eight revealed the rating of “ACCEPTABLE” according to Roberts criteria.
Classification ; Clinical Study ; Congenital Abnormalities ; Joints ; Knee ; Knee Joint ; Ligaments ; Osteoporosis ; Soft Tissue Injuries ; Tibia ; Weight-Bearing

Seven cases of traumatic fractured femoral heads with posterior dislocation of the hip were treated at the Keimyung University Hospital between November 1973 and December 1981. All cases were followed from 6 months to 8 years. Five cases were caused by traffic accidents. The other two cases were caused by a landslide. In six cases, at first a closed reduction was performed under general anesthesia and the femoral head was reduced in the acetabulum, but in 5 of the 6 cases head fragments were not reduced. So, after one or more days, open reductions were performed on the remaining 5 cases by internal fixation with iliac bone pegs (two-four). In the remaining one case of the 6, who had a head injury and an intestinal rupture, after the closed reduction, one head fragment was reduced but not anatomically. But because of his poor general condition, conservative treatment was taken. During conservative treatment redislocation and displacement of the head fragment occurred at the 4th week after the closed reduction was done. So this case was also treated by the above method. The 7th case, who has an ipsilateral femoral neck and intertrochanteric fracture, was reduced by primary open reduction. By the classification of the Pipkins, there were 4 cases of Type I and Type II, III and IV each had I case. The post operative X-ray and follow-up study showed that two were classified as excellent, four as good and the one who had the ipsilateral femoral neck and intertrochanteric fracture (Pipkin's Type III) was classified as poor.
Accidents, Traffic ; Acetabulum ; Anesthesia, General ; Classification ; Craniocerebral Trauma ; Dislocations ; Femur Head ; Femur Neck ; Follow-Up Studies ; Head ; Hip ; Landslides ; Methods ; Rupture