Traumatic brain injury (TBI) is one of the leading causes of death in the pediatric population in Korea. In addition, it can cause disability in children and adolescents, with physical and mental consequences. This causes a substantial burden on the health care system and occurs globally and not just in Korea. We searched and reviewed current data on the epidemiologic characteristics of pediatric TBI in Korea. Our review provides the recent epidemiological trend mainly focusing on incidence and mortality along with worldwide reported data. This review will be helpful to understand the global epidemiology of pediatric TBI and its differences between countries.

No abstract available.
Fingers*

No abstract available.
Chondromatosis, Synovial* ; Knee Joint* ; Knee* ; Osteoarthritis*

Genu recurvatum deformity of the knee can be due to the deformity of the bone of the proximal end of the tibia or to the changes in the soft tissues, or both. The causes of acquired genu recurvatum include trauma, wire traction of the tibia, operative procedures involving the proximal tibial physis, Osgood-Schlatter's disease, osteomyelitis and prolonged immobilization. The most frequent symptoms of genu recurvatum are weakness, pain and instability of the knee, genu valgus, and shortening of the affected lower extremity. Operative treatment consists of tibial osteotomy and soft tissue procedures performed on the capsule and ligaments, and recently percutaneous corticotomy of the proximal tibia and gradual correction by the Ilizarov external fixator became one of the treatment modalities. From Nov. 1990 to June 1993, the authors have performed gradual correction by the Ilizarov external fixator in 6 patients of genu recurvatum and the results were as follows. 1. The mean age was 14 years ranging from 11 to 21. And there were 2 males and 4 females. 2. In the past history, there were ipsilateral femur fractures in 5 cases in which 4 cases were treated with skeletal pin traction on the proximal tibia, and one case had ipsilateral open tibiofibular fracture. 3. After Ilizarov external fixation, proximal tibial corticotomy just inferior to the tibial tuberosity were performed in all 6 cases. 4. The follow up period was 19 months in average. 5. The results were evaluated according to a scoring system that was suggested by Lecuire et al.: 2 cases were excellent, 3 cases were good and 1 case was fair. 6. Ilizarov gradual correction was very effective not only in the treatment of genu recurvatum but also in the concurrent correction of limb length inequality and mechanical axis deviation of the lower extermity.
Congenital Abnormalities ; External Fixators ; Extremities ; Female ; Femur ; Follow-Up Studies ; Humans ; Immobilization ; Knee ; Ligaments ; Lower Extremity ; Male ; Osteomyelitis ; Osteotomy ; Socioeconomic Factors ; Surgical Procedures, Operative ; Tibia ; Traction

Seven patients with average age of 15years and 6 months (range: 8 years and 11 months 25 years and 6 months) underwent forearm lengthening by callotasis. The indications for lengthening were shortening and/or deformity of the forearm due to exostosis of the distal ulna in three cases, growth disturbance due to physeal injury of the distal radius in three, congenital radial dislocation in one. Three had lengthening of the radius, three of the ulna and one of both the radius and the ulna. The average lengthening achieved was 3.8 cm (3.5 - 4.0) in radius, 2.7 cm (2.3 - 3.0) in ulna. Complications encountered were pin tract infection in two cases, nonunion in one and temporary nerve palsy in one. All of these complications were recovered completely without any residua. Retrospective review after average 41 months of follow-up (range: 36 to 78) showed satisfactory improvement in appearance and function. Callotasis was considered as one of the safe and reliable treatment methods for bone lengthening and deformity correction of the forearm.
Bone Lengthening ; Congenital Abnormalities* ; Dislocations ; Exostoses ; Follow-Up Studies ; Forearm* ; Humans ; Osteogenesis, Distraction* ; Paralysis ; Radius ; Retrospective Studies ; Ulna

Gliomas are the most common pediatric tumors of the central nervous system. In this review, we discuss the clinical features, treatment paradigms, and evolving concepts related to two types of pediatric gliomas affecting two main locations: the optic pathway and thalamus. In particular, we discuss recently revised pathologic classification, which adopting molecular parameter. We believe that our review contribute to the readers' better understanding of pediatric glioma because pediatric glioma differs in many ways from adult glioma according to the newest advances in molecular characterization of this tumor. A better understanding of current and evolving issues in pediatric glioma is needed to ensure effective management decision.
Adult ; Brain Neoplasms ; Central Nervous System ; Classification ; Glioma ; Humans ; Optic Tract ; Pediatrics ; Thalamus ; Treatment Outcome

Vitamin B12 deficiency can cause myelopathy of subacute combined degeneration of lateral and dorsal column in spinal cord. When combined with compressive myelopathy, symptoms and signs of vitamin B12 deficient myelopathy could be masked. We experienced a case of forty-one year old man suffered from gait disturbance and decreased proprioception. Initially surgeons concluded his weakness resulted from myelopathy by C5-6 centrally herniated disk based on MRI and surgical decompression was performed. Gait disturbance slightly improved but decreased proprioception did not improve. Vitamin B12 deficiency was found and high signal intensity lesions were found in dorsal and lateral spinal column with review of pre-op MRI. After administration with vitamin B12 supplements, weakness and sensation of proprioception improved and follow-up MRI showed decreased signal intensity. We concluded the cause of his symptoms was combination of compressive myelopathy and vitamin B12 deficient myelopathy.
Decompression, Surgical ; Follow-Up Studies ; Gait ; Intervertebral Disc Displacement ; Masks ; Proprioception ; Sensation ; Spinal Cord ; Spinal Cord Compression ; Spinal Cord Diseases ; Spine ; Subacute Combined Degeneration ; Vitamin B 12 ; Vitamin B 12 Deficiency ; Vitamins

No abstract available.
Neuroblastoma* ; Precursor Cell Lymphoblastic Leukemia-Lymphoma*

The purpose of this study was to evaluate the effect of the polymerization shrinkage and modulus of elasticity of composites on the cusp deflection of class V restoration in premolars. The sixteen extracted upper premolars were divided into 2 groups with similar size. The amounts of cuspal deflection were measured in Class V cavities restored with a flowable composite (Filtek flow) or a universal hybrid composite (Z-250). The bonded interfaces of the sectioned specimens were observed using a scanning electron microscopy (SEM). The polymerization shrinkage and modulus of elasticity of the composites were measured to find out the effect of physical properties of composite resins on the cuspal deflection. The results were as follows. 1. The amounts of cuspal deflection restored with Filtek flow or Z-250 were 2.18 +/- 0.92 microm and 2.95 +/- 1.13 microm, respectively. Filtek flow showed less cuspal deflection but there was no statistically significant difference (p > 0.05). 2. The two specimens in each group showed gap at the inner portion of the cavity. 3. The polymerization shrinkages of Filtek flow and Z-250 were 4.41% and 2.23% respectively, and the flexural modulus of elasticity of cured Filtek flow (7.77 GPa) was much lower than that of Z-250 (17.43 GPa). 4. The cuspal deflection depends not only on the polymerization shrinkage but also on the modulus of elasticity of composites.
Bicuspid ; Chimera ; Collodion ; Composite Resins ; Elastic Modulus ; Microscopy, Electron, Scanning ; Polymerization ; Polymers