No abstract available.

No abstract available.

No abstract available.
DNA* ; Female* ; Humans* ; Prevalence* ; Uterine Cervical Neoplasms*

PURPOSE: To evaluate the radial displacement of clinical target volume in the patients with node negative head and neck (H&N) cancer and to quantify the relative positional changes compared to that of normal healthy volunteers. MATERIALS AND METHODS: Three node-negative H&N cancer patients and five healthy volunteers were enrolled in this study. For setup accuracy, neck thermoplastic masks and laser alignment were used in each of the acquired computed tomography (CT) images. Both groups had total three sequential CT images in every two weeks. The lymph node (LN) level of the neck was delineated based on the Radiation Therapy Oncology Group (RTOG) consensus guideline by one physician. We use the second cervical vertebra body as a reference point to match each CT image set. Each of the sequential CT images and delineated neck LN levels were fused with the primary image, then maximal radial displacement was measured at 1.5 cm intervals from skull base (SB) to caudal margin of LN level V, and the volume differences at each node level were quantified. RESULTS: The mean radial displacements were 2.26 (+/-1.03) mm in the control group and 3.05 (+/-1.97) in the H&N cancer patients. There was a statistically significant difference between the groups in terms of the mean radial displacement (p = 0.03). In addition, the mean radial displacement increased with the distance from SB. As for the mean volume differences, there was no statistical significance between the two groups. CONCLUSION: This study suggests that a more generous radial margin should be applied to the lower part of the neck LN for better clinical target coverage and dose delivery.
Consensus ; Displacement (Psychology) ; Head ; Head and Neck Neoplasms ; Humans ; Lymph Nodes ; Masks ; Neck ; Skull Base ; Spine

There have been several reports that total knee arthroplasty(TKA) was most likely to survive successfully if the coronal tibiofemoral angle was close to 7 degree of valgus, the accepted normal. In order to know whether the postoperative coronal tibiofemoral angle influences the result of total knee arthroplasty, we examined the 152 TKA cases in 106 patients which had been performed at Department of Orthopaedic Surgery, Seoul National University Hospital from Jan. 1987 to Dec. 1991. In our series the average follow-up period was 31 months(range, 13 months to 75 months). Coronal tibiofemoral angles of all cases were checked on weight bearing anteroposterior plain X-rays and were divided into three groups(less than valgus 2° ; valgus 3° to 7° ; greater than valgus 8°). All cases were analyzed on the knee score of Hospital for Special Surgery and the American Knee Society total knee arthroplasty roentgenographic evaluation and scoring system and the cases with radiolucent lines wider than 2mm were checked. Three groups were analyzed comparatively with statistical means(Wilcoxon signed rank test, X² test). There were no significant differences in the clinical results of total knee arthroplasty according to the postoperative coronal tibiofemoral angle. Lateral subluxation of the patella occurred more frequently when the postoperative coronal tibiofemoral angle was above valgus 8°. In the tibial components of group lesser than valgus 2°, the frequency of radiolucent lines wider than 2mm was higher than those of other groups, but its significance should be examined through long term follow-up.
Arthroplasty, Replacement, Knee ; Follow-Up Studies ; Humans ; Knee ; Patella ; Seoul ; Weight-Bearing

Although long-term studies of total knee arthroplasty(TKA) have confirmed reliable relief of pain and maintenance of function, survivorship at nine to ten years has been inconsistent with late component loosening being the most frequent mode of failure. Tibial component failure has been more frequent than failure of the femoral or patellar component in most TKA series. Encouraged by the early results of porous-ingrowh femoral and patellar components, and aware of retrieval studies showing poor bone ingrowth into tibial components, the “hybrid” method of fixation with an uncemented femoral component and a cemented tibial component, has been introduced and incorporated the potential advantages of both traditional fixation techniques. Between January 1987 and December 1991, forty-five “hybrid” TKAs(group I) were performed in degenerative arthritis and evaluated retrospectively in comparison with the results of nineteen noncemented porous-coated TKAs(group II) in degenerative arthritis. The average follow-up period was 31 months(range, 14 to 60 months) in group I and 26 months(range, 13 to 63 months) in group II. Using the knee rating scale of the Hospital for Special Surgery and the American Knee Society Roentgenographic Evaluation and Scoring System, clinical and radiological comparative study between two groups was performed. Pain scores, range of motion and HSS knee scores improved in both groups, but there was no significant difference between group I and group II(p>0.05). In both groups, the scores of radiolucent lines were significantly higher in zone 1 and 4 of A-P roentgenograph of the tibial component than in other zones(p < 0.05). The tibiofemoral angle was corrected from varus 2.7° to valgus 5.8° in group I and from varus 3.4° to valgus 4.6° in group II. There was no significant differences in component position and scores of radiolucnet lines between group I and group II. In conclusion, there were no significant differences in clinical and radiological results between the “hybrid” and the cementless groups. Results of this study suggest that both the hybrid fixation and the comentless techniques can reliably provide satisfactory clinical and radiological results in properly selected degenerative arthritis patients. But the final outcomes of this study need further evaluation through long term follow-up.
Arthroplasty, Replacement, Knee ; Follow-Up Studies ; Humans ; Knee ; Methods ; Osteoarthritis ; Range of Motion, Articular ; Retrospective Studies ; Survival Rate

Tumors involving the proximal humerus confront the surgeon with the problem of both eradicating the osseous lesions and restoring shoulder joint function. This problem is magnified because of the biomechanical complexity of the shoulder, its anatomic configuration, and its inherent lack of stabillity. With the increased interest in limb-sparing resection for lesions in the area, efforts are being made to improve the reconstructive techniques. These include leaving a flail shoulder, an being made to improve the reconstructive techniques. These include leaving a flail shoulder, an arthrodesis using intercalery graft between the scapula and the remaining humerus, or if the glenoid is preserved, an arthroplasy. From January 1984 to December 1993, 23 patients with a malignant or locally aggressive bone tumor in the proximal humerus were treated by limb-sparing surgery in Seoul National University Hospital. Histologic diagnosis included osteosarcoma(6), chondrosarcoma(2), Ewing's sarcoma(1), metastatic bone tumor(11), and recurred giant cell tumor(3). Options for reconstruction following limb-sparing resection in our cases were 10 prosthetic arthroplasties, 3 arthrodeses with an living fibula graft, and 10 arthroplasties with intramedullary nailing and cementization. We performed a retrospective analysis in view of tumor eradication and performance status with modified functional evaluation system of Musculoskeletal tumor Society. In 7 cases(74%), good or fair performance status was acquired with average 3.6 years follow-up(6 months-11 years). Each option for reconstruction resulted in relatively good outcome but rather better result was acquired in giant cell tumor and chondrosarcoma. Estimated survival rates by Kaplan-Meier's method, 5 year survival rate was 81% in primary malignant bone tumors(12), 76% in stage Ⅱ B malignancies(5) with 4 years and 4 months follow-up. There was no regional recurrence in primary malignant bone tumors but there were three cases in which distant pulmonary metastases were found in follow-up. Complicationss were one soft tissue infection, two nonunions in arthrodesis with a living fibula graft and one dislodgement of prosthesis in prosthetic arthroplasty. In summary, each option for limb-sparing surgery in malignant bone tumor of proximal humerus might result in rather satisfactory outcome in performance and survival rate when effective preoperative and postoperative chemotherapy were performed in adequately selected cases.
Arthrodesis ; Arthroplasty ; Chondrosarcoma ; Diagnosis ; Drug Therapy ; Extremities ; Fibula ; Follow-Up Studies ; Fracture Fixation, Intramedullary ; Giant Cell Tumors ; Giant Cells ; Humans ; Humerus ; Methods ; Neoplasm Metastasis ; Prostheses and Implants ; Recurrence ; Retrospective Studies ; Scapula ; Seoul ; Shoulder ; Shoulder Joint ; Soft Tissue Infections ; Survival Rate ; Transplants

Results of 170 total knee arthroplasties(TKAs) performed from 1986 to 1995, followed up for at least one year, were reviewed. Lateral retinacular release was performed in 76 knees(45%) and not performed in 94 knees(55%). We compared the results of TKAs combined with lateral retinacular release with those without lateral retinacular release. The clinical results of TKAs were evaluated by the Knee Scoring System of Hospital for Special Surgery(HSS). The average follow-up period was 34 months. The clinical results assessed by HSS score, pain score and range of motion improved postoperatively in both groups, but there was no significant difference between the two groups. There were 8(4.7%) with patellar subluxations in 170 TKAs, one(1.3%) in the group with lateral retinacular release and 7(7.5%) in the group without lateral retinacular release(t-test; p<0.05). Analysis of lateral tilt of patella on roentgenographs also showed a significant difference between the two groups. 7 knees(9.2%) with lateral tilt were observed in the group with lateral retinacular release and 22 knees(23.4%) with lateral tilt in the group without lateral retinacular release(t-test; p<0.05). There was no osteonecrosis or fracture of patella in either group. In summary, lateral retinacular release might improve the patellar tracking and lower the incidence of patellar subluxation and lateral tilt of patella. Lateral retinacular release alone did not seem to cause patellar osteonecrosis and subsequent patellar fracture which were detectable in plain roentgenographs. So, we suggest that lateral retinacular release can be performed without great risk of potential patellar complications in TKAs requiring lateral retinacular release for proper patellar tracking.
Arthroplasty* ; Follow-Up Studies ; Incidence ; Knee* ; Osteonecrosis ; Patella ; Range of Motion, Articular

Lymphomatoid papulosis (LyP), first described by Macaulay in 1968, is a paradoxical skin disease characterized by a generally clinical benign course, in contrast to malignant histological features. LyP is rarely seen in children. We herein report a case of LyP in a 10-year-old boy who had a 4-week history of multiple, scattered erythematous papules, crusted papules or ulcerated papules on the trunk, arms and thighs. Histopathologically, there was a superficial and midderma1 perivascular and interstitia1 infiltrate composed primarily of lymphocytes, which were admixed with large, atypical, mononuclear cells with pleomorphic nucleus. These atypical cells expressed CD30 (Ki-1) antigen. This is the first reported case in Korea of LyP present in a child.
Arm ; Child* ; Humans ; Korea ; Lymphocytes ; Lymphomatoid Papulosis* ; Male* ; Skin Diseases ; Thigh ; Ulcer

Trichoadenoma is a rare tumor with differentiation towards the infundibular portion of the pilosebaceous canal. Clinically, it is a nodular growth, usually on the face and buttock. Histologically, it is characterized by numerous horn cysts lined with squamous epithelium in the dermis. In this report, we describe a 44-year-old man who developed trichoadenoma on his right shin. Anti-CD34 antibody stained spindle-shaped cells in the stroma just adjacent to the peripheral layers of keratinous cysts and solid masses of squamous epithelial cells. To our knowledge, this is the first description of an occurrence of trichoadenoma in the lower leg and the first to use immunohistochemical staining to know the CD34 staining pattern.
Adult ; Animals ; Buttocks ; Dermis ; Epithelial Cells ; Epithelium ; Horns ; Humans ; Leg