No abstract available.
Radius*

In shape and dimensions, the tibial plateaus are asymmetric with the larger medial tibial plateau and both have a posterior inclination with respect to the shaft of the tibia. Maximizing tibial coverage is an impotant consideration in total knee arthroplasty to provide stahility and load transfer and to improve long-term survival rate of the implants. Most tihial tray designs are symmetric, but several asymmetric designs are available. We evaluated the proximal tibial resection surface during total knee aithroplasty to delineate the tibial plateaus in korean. After tihial bone cut during 100 TKA procedures, the outline of tibial resection suiface was traced and rotational axis of true tibial component was marked intraoperatively. A line was drawn at the maximal anteroposterior (AP) diameter of lateral tibial condyle with parallel to rotational axis of component, and then a transverse axis was drawn at the midpoint of maximal AP diameter of 1ateral tibial condyle. Anteroposterior 10, 20, 30., 40% and midpoint from the media1 and lateral peripheries were calculated manually. The average AP medial 10, 20, 30 and 40% dimensions were 34.7, 43.8, 48.0 and 43.2mm, respectively. The average AP lateral 10, 20, 30 and 40% dimensions were 30.2, 38.4, 42.0 and 40.9mm, respectively. The ratio of medial/lateral AP dimensions 10, 20, 30 and 40% from periphery were 116.9, 114.7, 114.5 and 106.4%, respectively. From these data, we know the asymmetry of the proxirnal tibia1 plateaus in korean. We hope that rnore data will be ohtained in multicenter studies and it will help us to select tibia1 tray and to design the tibial component in korean. But, more accurate standard measures will he need to minimize an error of measurements.
Arthroplasty* ; Axis, Cervical Vertebra ; Hope ; Knee* ; Survival Rate ; Tibia

No abstract available.
Abscess* ; Magnetic Resonance Imaging*

Neuromyelitis optica (Devic`s syndrome) is a rare demyelinating disorder of unknown etiology in which unilateral or bilateral optic neuritis and transverse myelitis occur within an 8-week time interval. It is 8 disorder that occurs more common in children than in adults. The prognosis is better in children than in adults. The authors experienced 8 case of neuromyelitis optica in a 5-year-old female who developed acute visual loss of the left eye, sensory loss below the 4th thoracic derinatoine, paraplegia, fever and nuchal ridigity ; all following viral prodromes. We diagnosed this case through neurologic features, magnetic resonance imaging, and cerebrospinal fluid findings. She has irnproved without any specific treatment.
Adult ; Cerebrospinal Fluid ; Child* ; Child, Preschool ; Demyelinating Diseases ; Female ; Fever ; Humans ; Magnetic Resonance Imaging ; Myelitis, Transverse ; Neuromyelitis Optica* ; Optic Neuritis ; Paraplegia ; Prognosis

No abstract available.
Neurilemmoma*

No abstract available.
Chordoma*

The subject of ankle injuries has for a long time been embedded in controversy. The injuries to the ankle joint complex include not only injuries that cause disruption of the bone architecture of the ankle joint but often significant ligamentous and soft tissue components. Strong differences of opinion exist regarding the preferred method of treatment, the length of time immobilization is necessary, the postreduction management and the criteria of what constitutes an acceptable reduction. Follow up of 52 cases was possible which were admitted to the department of orthopedics, Kyung- pook University Hospital during the period of January, 1974 to december 1983. The results obtained from this study were as follows; 1. Among the 51 patient, male was 45 (88.2%) patients and female 6 (11.8%) patients. Most of the patient were in the ages between 20 and 30. 2. Of the 52 cases, the main cause of fractures were traffic accident 33 (63.5%) cases and the other causes were falling from a height 9 (17.5%), slipping down 3 (5.7%) and sport injury 1 (1.9%) in order. 3. Open fracture was 16 (31%) and closed fracture was 36 (69%). 4. According to the classification of Lauge-Hansen, the supination-external rotation type 18 (34.6%) was the commonest type. 5. Among the 52 cases, 32 cases were treated by open reduction and 20 cases by closed reduction. 6. The average peried of the cast immobilization after the open reduction was 6Wks. but the closed reduction was 8Wks. 7. According to clinical and radiological accessment of the result of treatment for bimalleolar Fx, internal fixation of both medial & lateral malleolus was better than medial malleolus only. 8. The fibular fracture involving lateral malleolus and the diastasis of the distal tibiofibular syndesmosis were very important in ankle stability and were treated by internal fixation for accurate anatomical reduction.
Accidental Falls ; Accidents, Traffic ; Ankle Fractures ; Ankle Injuries ; Ankle Joint ; Ankle ; Classification ; Clinical Study ; Female ; Follow-Up Studies ; Fractures, Closed ; Fractures, Open ; Humans ; Immobilization ; Ligaments ; Male ; Methods ; Orthopedics ; Sports

Dislocation of the metacapophalangeal joint of the finger is apparently rare except thumb. The mecchanism of injury seems to be direct injury that produces hyperextension of metacapophalangeal joints. In 1957, Kaplan advocated the triple incision, that is release of the volar fibrocartilaginous plate, the natatory ligament, and the superficial transverse metacapal ligament, expose the operation field through palmar approach. In 1975. Becton advocate direct dorsal longitudinal incision. The advantages of this approach as compared with the volar approach are 1. There is full exposure of the fibrocartilaginous volar plate, the main structure blocking reduction. 2. Digital nerves are not as apt to be damaged. 3. Accurate reduction and fixation of the osteochondral fracture of the metacarpal head is possible. We exprenced 6 cases of index metacarpophalangeal dislocation and treated with dorsal approach.
Dislocations ; Fingers ; Head ; Joints ; Ligaments ; Metacarpophalangeal Joint ; Thumb

The craniopharyngima has been known to be congenital origin and primary tumor of childhood. The craniopharyngioma may be found at all ages, though nearly one half in the first twenty years of life and equally in either sex. Important differences exist between younger and older patients. In children, signs of increased intracranial pressure, endocrine Abnormality and radiological calcification are common. In adults, mental disturbance becomes of increasing importance as well as remaining visual failure and endocrine disturbance. Because of slow growing rate of tumor in adult, subtotal excision is recommended. A 39-year-old male patient, suffering from agitation memory disturbance and almost total blindness, was diagnosed craniopharyngioma by neuroradiologic examinations. After surgical treatment, mental symptoms and visual acuity improved much more than before operation.
Adult* ; Blindness ; Child ; Craniopharyngioma* ; Dihydroergotamine ; Humans ; Intracranial Pressure ; Male ; Memory ; Visual Acuity

To elucidate the funcion of arachidonic acid as a secondary brain edema facotr, the infusion edema model was constucted using adult cats with studies of somatosensory evoked potentials, regional cerebral blood flow of white matters, brain water contents, magentic resonance images and histological findings. Among 50 cats, 6 cats were used as sham poerated group without infustion and in 45 cats solutions of various concentrations of arachidonic acid and physiologic saline were infused into the left and right frontal white maters respectively. According to the different concentrations of arachidonic acid, three groups were named as group A(0.1mg/ml), group B(1mg/ml), group C(10mg/ml). During 4 hours of slow infusion of the infusates(average 0.5ml in each side totally) central conduction time(CCT) was measured every an hour with contralateral median nerve stimulation bilaterally and cerebral blood flow(CBF) of white matter was measured by hydrogen clearance method every 2 hours. Finally the cats were sacrificed and specimens of edematous white matter obtained bilaterally at the coresponding points. Water contents were measured with vacuum freeze drying method. T2-weighted magnectic resonance images(MRI) and light microscopic studies were performed in a cat of each groups. The results were as followed ; 1) MRI and histologic findings showed that the infusion brain edema technique was efective in inducing interstitial edema, but the differences in the degree of edema formation between the right and the left sides were not siginificant in all groups. 2) There were no statistically significant difference between the water contents of the right and that of left in all groups. 3) Either infusion of arachidonic acid or physiologic saline in the white matter did not change regional white matter CBF in all groups. 4) The I-N1 interpeak latency was labelled as central conduction time(CT), and the baseline CCT was 5.83+/-0.52msec. 5) The differences of CCT between infusion group and noninfusion group were statistically significant in group C at 2, 3, 4hours(p>0.01) and the differerences of cct between arachidonic acid and physiologic saline infustion sites were statistically significant in group B at 4 hors, group C at 1 hour(p>0.05) and group C at 2, 3, 4hours(p>0.01) after eginning of infusion and the differences increased with time in group C(p>0.01). The results indicate that arachidonic acid does not have edemogenic properties during 4 hours infusion but may induce neurologic dysfunction as to increase the CCT in somatosensory evoked potential studies if it exists in the edema fluid of brain white matter.
Adult ; Animals ; Arachidonic Acid* ; Brain Edema ; Brain* ; Cats ; Edema ; Evoked Potentials, Somatosensory* ; Freeze Drying ; Humans ; Hydrogen ; Magnetic Resonance Imaging ; Median Nerve ; Neurologic Manifestations ; Vacuum