No abstract available.
Basal Ganglia ; Hypocalcemia*

Because clinical course of the Legg-Calve'-Perthes disease (LCPD) is varied and unpredictable, it is important that pediatric orthopedists have to know prognostic factors of LCPD in order to choose proper method of treatment. The most universally accepted prognostic factor is the patient's age at the onset of the disease, and most patient's who are less than 5 years old have been treated non-operatively. However, we believe that the extent of involvement of the femoral head is more important in this age group and that operative treatment can get good results in cases of servere head involvement. The purpose of this study is to evaluate the efficacy of femoral varus osteotomy in patients before the age of 5 years with severe involvement. We reviewed 18 patients (23 hips) who were less than 5 years old with Catterall group III (5 patients, 7 hips) or IV (13 patients, 16 hips) involvement from June 1984 to June 1994. Femoral varus osteotomies were performed in all cases. We followed up more than 2 years (range, from 24 to 130 months) and analysed clinical and radiological results. The results were as follows: 1. The mean duration from onset of the disease to the stage of repair was 16 months (range, from 8 to 27 months). 2. 2 hips (28.6%) in group III and 12 hips (75%) in group IV showed radiographic head at-risk signs. 3. Clinically all hips in group III showed good result. However, among the 16 hips in group IV, 13 hips were rated good and 3 hips were fair. Overall, 20 hips (86.9%) showed good result. 4. Radiologically all hips in group III showed good result, whereas in group IV, 10 hips were rated good and 6 hips were fair. Overall, 17 hips (78.9%) showed good result. We concluded that femoral varus osteotomy in patients less than 5 years old with severe involvement might shorten the course of disease and might be effective method.
Child* ; Child, Preschool* ; Fibrinogen ; Head ; Hip ; Humans ; Legg-Calve-Perthes Disease* ; Osteotomy*

Recent advances in surgical techniques and equipment have made bone lengthening by callotasis both easier and safer, and many successful clinical cases have been reported. The callus formation, however, has often been very poor, and prolonged applied of the external jixator increases the risk of serious complications, such as pin tract infection. We reviewed 68 cases of limb lengthenings performed with callus distraction in 48 patients at Kang Nam St. Mary' s Hospital between January 1989 and May 1994. There were 29 female and 19 male patients, with an average age of 19 (6-50) years. Causes of limb shortening were short stature (14), poliomyelitis (8), fracture and physeal damage (6), osteomyelitis (6), Legg-Calve-Perthe's disease (4), bone tumor (3), congenital dislocation of the hip (3), leg length discrepancy (3), achondroplasia (2) and hip dysplasia (1). Sixty eight calluses were classified radiographically into 6 types: external, straight, attenuated, opposite, pillar, and scattered. The healing indexes and complications following the procedure were evaluated. The mean femoral lengthening was 6.2 (2-10) cm, the tibial 6.5 (3.3-15.7) cm, the forearm 1.8 (1.6- 2.2) cm and the humerus 10 cm. Fifteen cases classified as external type, 5 femur, 7 tibiae, 2 forearm and 1 humerus, with healing index of 34 days/cm and no major complications. Thirty one cases classified as straight type, 7 femur, 22 tibiae, 1 forearm and 1 humerus with healing index of 38 days/cm and 2 obstacles. Fourteen cases classified as attenuated type, 4 femur and 10 tibiae with healing index of 47 days/cm and 2 obstacles. Six cases classified as opposite type, 4 femur and 2 tibiae with healing index of 65 days/cm and 3 obstacles and 1 residual complications. Two cases classified as scattered type, 2 tibiae with healing index of 116 days/cm and 5 obstacles. The scattered type of the callus in two cases was suspected to be a result of poor callus formation due to K-wire breakage conditions that autogenous bone marrow transplantations were performed. This classification enabled us to estimate the intrinsic conditions, predict the healing index, incidence of complications, and decide to apply early bone marrow injection to the callus.
Achondroplasia ; Bone Lengthening ; Bone Marrow ; Bony Callus* ; Classification* ; Dislocations ; Extremities* ; Female ; Femur ; Forearm ; Hip ; Hip Dislocation ; Humans ; Humerus ; Incidence ; Leg ; Male ; Osteogenesis, Distraction ; Osteomyelitis ; Poliomyelitis ; Tibia

We investigated the occurrence of color vision loss in 70 organic solvent mixtures exposed workers and in 47 controls. Color Vision was assessed with a color arrangement test designed to identify the defective color sense, the Han Double 15-Hue Test. The results of the test were no significant difference between exposed workers and controls in the proportion of subjects who committed one or two errors. Quantitative analysis, using color confusion index(CCI), showed no signifiant difference between exposed workers and controls. A significant linear correlation was present between age and CCI in both exposed workers(CCi=0.0056age + 0.94; r=0.23; p<0.05) and controls(CCI=0.0066age + 0.86; r=0.33; p<0.05). Qualitative analysis of the patterns on the hue circle showed that the prevalence of acquired dyschromatopsia was 21% in both and no significant difference. Multiple regression analyses showed that age was significantly related to color vision loss. These results did not provide evidence of a relationship between organic solvents exposure and incidence of color vision loss. In field studies for monitor the people at risk of the acquired color vision loss involving low-dose organic solvents exposed workers, both quantitative and qualitative information should be considered.
Color Vision ; Incidence ; Prevalence ; Solvents

Congenital mesoblastic nephroma(CMN) is an important differential diagnosis of a renal mass occurring in the newborn or in early childhood. It was first described by Bolande as a separate disease entity distinct form Wilms' tumor. In 1974, Beckwith has predicted that this tumor has a pathologic spectrum with classic congenital mesoblastic nephroma at one extreme, unequivocally mallignant spindle cell sarcomas at the other, and intermediate "gray zone" lesions of indeterminate biologic significanse. In 1986, Joshi has described "atypical mesoblastic nephroma" as a potentially aggressive variant of CMN, which shows atypical gross and microscopic features such as hemorrhage, necrosis, high cellularity, and mitotic index. We report of a case of atypical mesoblastic nephroma presenting in a 38 days-old male infant. Grossly, the tumor involved the upper and midportion of the left kidney. On section, the cut surface was fleshy, grayish-white, and homogeneous. Microscopically, the tumorshowed high degree of cellularity and arrangement of fusiform cells in sheets and vague interlacing bundles. The individual tumor cells showed fusiform to oval nuclei, indistinct scanty pale-eosinophilic cytoplasm and many mitotic figures.
Infant ; Child ; Male ; Female ; Infant, Newborn ; Humans ; Diagnosis, Differential

Pleomorphic xanthoastrocytoma is histologically characterized by marked cellular pleomorphism of lipid-laden neoplastic astrocytes and bizarre giant cells showing mitotic figures and high cellularity. Inspite of its ominous-looking microscopic features, howerver, the prognosis is usually favorable. This tumor develops mainly in the supratentorial area of young people and frequently involves the leptomeninges. We experienced a case of pleomorphic xanthoastrocytoma in 18 year-old-male. In addition to the cellular pleomophism, the prominent reticulin fibers surround the individual tumor cells or the tumor cells nests. Immunohistochemical staining and electron microscopy revealed glial fibrillary acidic protein(GFAP) expression and pericytoplasmic basal lamina in the tumor cells.

Materials and Methods: A total of 264 patients (74 CN and 190 AD), who underwent FBB imaging test and neuropsychological tests, were retrospectively analyzed. Early- and delay-phase FBB images were spatially normalized with an in-house FBB template. The regional standard uptake value ratios were calculated with the cerebellar region as a reference region and used as independent variables that predict the diagnostic label assigned to the raw image. Results: AD positivity scores estimated from dual-phase FBB showed better accuracy (ACC) and area under the receiver operating characteristic curve (AUROC) for AD detection (ACC: 0.858, AUROC: 0.831) than those from delay phase FBB imaging (ACC: 0.821, AUROC: 0.794). AD positivity score estimated by dual-phase FBB (R: −0.5412) shows a higher correlation with psychological test compared to only dFBB (R: −0.2975). In the relevance analysis, we observed that LSTM uses different time and regions of early-phase FBB for each disease group for AD detection. Conclusions These results show that the aggregated model with dual-phase FBB with long short-term memory and attention mechanism can be used to provide a more accurate AD positivity score, which shows a closer association with AD, than the prediction with only a single phase FBB.

A patient with extraskeletal cervical epidural Ewing's sarcoma who presented with cervical radiculopathy is reported. A 58-year-old woman presented with right posterolateral neck pain and upper extremity radiculopathy. The computed tomography myelography showed epidural and paravertebral masses on right side, with widening of the ipsilateral neural foramina at the C2-C3 level. On magnetic resonance images, the mass was isointense to soft tissue on T1-weighted images, hyperintense on T2-weighted images, and showed diffuse enhancement on GdTA enhanced T1-weighted images. The staged, combined posterior and anterior approach were done and the tumor mass was subtotally removed. During postoperative adjuvant chemotherapy with Cytoxane, Adriamycin, Vincristine, Prednisolone regimen, the patient died of severe compression of upper cervical cord by recurrent, extended tumor mass in the spinal canal.
Chemotherapy, Adjuvant ; Cyclophosphamide ; Doxorubicin ; Drug Therapy ; Female ; Humans ; Middle Aged ; Myelography ; Neck Pain ; Prednisolone ; Radiculopathy ; Sarcoma, Ewing* ; Spinal Canal ; Upper Extremity ; Vincristine

No abstract available.
Epilepsy, Benign Neonatal*

In the past, arthrodesjs was a widely used procedure but in recent times, with the development of replacement arthroplasty, decreased in tuberculosis and polio. etc, it is not commonly used by orthopedic surgeons. However, for those in the young age group, people employed in hard labor and patients with acute inflammatory disease, arthrodesis is through to be more appropriate than replacement arthroplasty. From January 1980 to December 1985, 20 cases of arthrodesis of the knee joint were carried out. The results were follows.; 1. Methods of arthrodesis used were Charnley compression arthrodesis in 10 cases, Hoffman compression arthrodesis in 2 cases, cross pinning in 3 cases and and cross pinning with patella graft in 5 cases. 2. Bone union was seen in all 12 cases of compression arthrodesis at an average of 21.3 weeks while bone union was seen in 7 out of 8 cases of non-compression arthrodesis at an average 25 weeks. 3. Among the 20 cases, complication were pseudoarthrthrosis in one case, pin tract infection in 2 cases and skin necrosis in 5 cases. 4. Inconclusion of the above results, bone union was carried out in 19 cases out of total 20 cases, and compression arthrodesis showed faster bone union at an average of 3.7 weeks earlier than non-compression arthrodesis.
Arthrodesis ; Arthroplasty, Replacement ; Humans ; Knee Joint ; Knee ; Necrosis ; Orthopedics ; Patella ; Poliomyelitis ; Skin ; Surgeons ; Transplants ; Tuberculosis