Treatment methods of unicompartmental osteoarthritis of knee joint are arthroscopy, osteotomy, unicompartmental arthroplasty, and total arthroplasty. Among them the rate of unicompartmental arthroplasty is increased and many complications are reported recently. Polyethylene wear and component loosening, and infection are the common failure mechanism, but dislocation of meniscal polyethylene is rare, and not reported. So we report the case of the dislocation of polyethylene and study the cause and preventive method.

The pseudoaneurysm of the popliteal artery following an arthroscopic posterior cruciate ligament reconstruction is rare. We present a case of the delayed pseudoaneurysm of the popliteal artery after arthroscopic posterior cruciate ligament reconstruction. Open excision of the pseudoaneurysm and pin-point repair were done. Retrospectively reviewing the case, we found that the relation of the popliteal artery and posterior cruciate ligament on preoperative magnetic resonance images can predict the complication of pseudoaneurysm of the popliteal artery.
Aneurysm, False ; Magnetic Resonance Spectroscopy ; Popliteal Artery ; Posterior Cruciate Ligament ; Retrospective Studies

Multiple non-contiguous spinal fracture is a special type of multi-level spinal injury, which is rare but most frequently occur in motor vehicle accident or a falling from a height. We report five patients of multiple non-contiguous spinal fractures. All patients underwent segmental pedicle screws fixation without fusion for preserving facet joints and minimizing blood loss and operation time. We performed necessary operation for any concomitant injuries at the same day.
Humans ; Motor Vehicles ; Spinal Fractures ; Spinal Injuries ; Spine ; Zygapophyseal Joint

Kyphoplasty has recently attended as a potential treatment for sacral insufficiency fracture. We report a 85-years-old female patient with osteoporotic S1 insufficiency fracture with absence of trauma history treated with kyphoplasty which has no symptom improve with conservative treatment. Kyphoplasty is an effective and useful procedure in the treatment of the sacral insufficiency fracture, additionally reviewed of the literatures.
Female ; Fractures, Stress ; Humans ; Kyphoplasty ; Sacrum

The retrospective analysis was performed on 37 patients with stage III non small cell lung cancer who received the radiotherapy from Feb. 1986 to Dec. 1990 at the Dept. of Radiation Oncology, National Medical Center. This analysis, with 29 patients (78.4%) having been followed from 10 to 60 months, was done to know the survival rate and significant prognostic factor. The actuarial 2, 5-year survival rates were 20.6%, 6.9% in our all patients and Median survival time was 10 months. Of patients with KPS(Karnofsky performance status) greater than 80%, the 2, 5 year survival rate and median survival time were 29.2%, 9.7% and 13 months, respectively. The 2-year survival rate and median survival time of patients with KPS less than 80% were 13.7% and 7 months, respectively. The survival difference according to performance status was statistically significant(29.2% vs. 13.7%)(p<0.05). In stage IIIa, the 2, 5-year survival rate and median survival rate and median survival time were 29.2%, 9.7% and 12 months, respectively. The 2-year survival rate and metian survival time of stage IIIb were 8.6% and 10 months, respectively. The survival difference between stage IIIa and IIIb did not show statistical significance(p>0.1). Of the prognostic factors, the difference of survival rate by initial performance status was statistically significant (p<0.05). But the difference of survival rates by pathologic cell type, stage, total radiation dose, radiotherapy response, and combination with chemotherapy were not statistically significant.
Carcinoma, Non-Small-Cell Lung* ; Drug Therapy ; Humans ; Radiation Oncology ; Radiotherapy ; Retrospective Studies ; Small Cell Lung Carcinoma ; Survival Rate

In multiple myeloma (MM), hyperdiploidy (HD) is known to impart longer overall survival. However, it is unclear whether coexistent HD ameliorates the adverse effects of known high-risk cytogenetics in MM patients. To address this issue, we investigated the clinicopathological characteristics of HD with high-risk cytogenetics in MM. Ninety-seven patients with MM were included in the study. For metaphase cytogenetics (MC), unstimulated cells from bone marrow aspirates were cultured for either 24 or 48 hours. To detect HD by interphase fluorescence in situ hybridization (iFISH), we assessed trisomies of chromosomes 5, 7, 9, 11, 15, and 17. Of the 97 MM patients, 40 showed HD. The frequency of co-occurrence of HD and high-risk cytogenetics was 14% (14/97). When the clinicopathological characteristics were compared between the two groups of HD with high-risk cytogenetics vs. non-HD (NHD) with high-risk cytogenetics, the level of beta 2 microglobulin and stage distribution significantly differed (P=0.020, P=0.032, respectively). This study shows that some of the clinicopathological characteristics of MM patients with high-risk cytogenetics differ according to HD or NHD status.
beta 2-Microglobulin ; Bone Marrow ; Cytogenetics* ; Fluorescence ; Humans ; In Situ Hybridization ; Interphase ; Metaphase ; Multiple Myeloma* ; Trisomy

Osteochondroma of the proximal fibula is relatively common, but there are only rare reports of this lesion in conjunction with peroneal nerve palsy. We report here on a case of the peroneal nerve palsy secondary to fibular head osteochondroma, and the patient experienced complete recovery of function following the excision of the tumor and neurolysis of the peroneal nerve.
Fibula ; Head ; Humans ; Osteochondroma ; Paralysis ; Peroneal Nerve ; Recovery of Function

PURPOSE: We modified the Scuderi bone graft method for severely varus deformed patients, and then analyzed the clinical and radiological results and the changes of BMD at bone graft site. MATERIALS AND METHODS: Twenty-three total knee arthroplasties were performed in severely deformed varus knees. The proximal tibia was resected less than 10 mm thickness. In anteroposterior and tibial plateau view, defects was converted into a trapezoidal wedge shape for the self locking, and preserved anterior and posterior cortex. The defect was filled with an autogenous bone graft and fixed with two screws perpendicularly for early ambulation. RESULTS: The graft was completely united in 21 cases (90%) and the average of the union was 4 months postoperatively. The results were classified as excellent in 16 knees (70%) , good in 6 knees (26%) , and fair 1 knee (4%) using HSS knee rating scale. The average arc of motion was 115. and the tibio-femoral angle was 6.3. valgus. The BMD of bone graft site was checked 1.03 +/- 0.033 g/cm2 postoperatively and converted to 0.82 +/- 0.075 g/cm2 at follow-up 1 year. CONCLUSION: Modified autogenous bone graft could be preserved the subchondral bone essential for optimal thickness of cement and fixation of the tibial component.
Arthroplasty* ; Early Ambulation ; Follow-Up Studies ; Humans ; Knee* ; Tibia ; Transplants*

PURPOSE: To evaluate unilateral external fixation when applied as the standard treatment of displaced femoral shaft fractures in children. MATERIALS AND METHODS: From 2000 through 2004, we used a unilateral external fixator (Any-fix(R)) to treat 24 femoral shaft fractures. The average age of the patients was 8.3 years (range, 5.6 to 14.8). 16 fractures were isolated, and 8 were associated with polytrauma. There were 4 open fractures. Patients were followed clinically and radiologically until healing and at 1 year. RESULTS: Average time of external fixation was 97 days (range, 57 to 130 days). All patients regained the normal range of motion of knee joint without significant residual leg length discrepancy or growth disturbance. There were no nonunion, or rotationary deformities. There were 26 pin tract infection (total pin number: 108) (24%), all of which were resolved with antibiotics. No patient developed osteomyelitis. There were two refractures after fixator removal. There was one case of reduction loss and one of valgus deformity. CONCLUSION: The external fixation is a useful alternative for operative management of femoral shaft fractures because of minimal invasive operation, and early mobilization in prepuberty.
Anti-Bacterial Agents ; Child ; Congenital Abnormalities ; Early Ambulation ; External Fixators ; Femur* ; Fractures, Open ; Humans ; Knee Joint ; Leg ; Multiple Trauma ; Osteomyelitis ; Reference Values

PURPOSE: To demonstrate the presence of nerve fibers including nociceptive fibers in synovium of human knee joint using immunohistochemistry. MATERIALS AND METHODS: 10 Synovial membrane tissues of knee joint obtained from 5 cadavers were analyzed immunohistochemically using antibodies to protein gene product 9.5, betaIII-tubulin, substance P and calcitonin gene-related peptide (CGRP). RESULTS: Many nerve fibers immunoreactive for protein gene product 9.5 and betaIII-tubulin were demonstrated in synovial folds of human knee joints. Also, immunostaining showed the presence of free nerve ending fibers immunoreactive for substance P and calcitonin gene-related peptide in synovium. CONCLUSION: The presence of putative nerve fibers including nociceptive fibers in synovial folds supports a possible role for theses structures as source of knee joint pain.
Antibodies ; Cadaver ; Calcitonin Gene-Related Peptide ; Humans* ; Immunohistochemistry ; Knee Joint ; Knee* ; Nerve Endings ; Nerve Fibers* ; Substance P ; Synovial Membrane*