No abstract available.
Occupational Health*

The chondrogenic potential of free autogenous periosteal grafts for osteochondral defects was investigated at the Department of Orthopaedic Surgery, Yonsei University, Wonju College of Medicine. Five millimeter diameter of circular full-thickness defects were made in patellar groove of both femur in 64 adolescent rabbits and the rectangular periostei, prepared from the proximal tibiae, were placed over the defects of patellar groove and sutured(cambium layer, facing joint surface) and the rabbits were allowed to move actively. A serial gross and histologic examinations of neochondrogenesis were done during 8 weeks. The results were as follows. l. At 2 weeks after operation, neochondrogenesis was hardly seen either in the graft group or in the control group. The defects were partially filled with some fibrous tissue. 2. After 6 weeks of operation, all defects in the graft group(postop 6 weeks and 8 weeks) were filled with hyaline cartilage cells but only 38% (postop 6 weeks) and 44% (postop 8 weeks) of the control group were filled with hyaline cartilage cells. 3. The cartilages, formed at 6 and 8 weeks, were more mature and better than those formed at 4 weeks. 4. The newly formed hyaline cartilage of the graft group filled the defect earlier and were better than those of the control group. 5. The chondrocytes in the newly formed tissue were originated from the cambium layer of periosteal grafts. 6. Free autogenous periosteal grafts can repair a full-thickness defect in a joint surface by producing tissue that resembles articular cartilage grossly and histologically.
Adolescent ; Cambium ; Cartilage ; Cartilage, Articular ; Chondrocytes ; Femur ; Gangwon-do ; Humans ; Hyaline Cartilage ; Joints ; Rabbits ; Tibia ; Transplants

We performed 15 cases of modified Bristow procedures for recurrent anterior instability of shoulder from january, 1987 to december, 1992 and the following results were obtained. 1. The patient's age at initial dislocation varied from 15 years to 29 years of age. 2. The most common cause of the recurrent anterior instability of shoulder was sport injury(6 cases) and next were traffic accident, hanging with one hand. 3. The average loss of external rotation of shoulder after operation were 10 degrees and internal rotation were 7 degrees. 4. The post-operative complication and recurrence were not observed. 5. End results were excellent in 7 and good in 5 by Rowe's grading system. 6. Strict attention to bone block placement was mandatory and decreased the risk of screw malpo-sition.
Accidents, Traffic ; Dislocations ; Hand ; Recurrence ; Shoulder ; Sports

No abstract available.
Humans

To understand the expression of hoth TGF-beta l and II ligands and the receptors, artificial fracture was made on rat femur. Fracture callus and epiphyseul plate were stained immunohistochemically on 3rd. 7th, 14th, 21st, 42nd and 56th day after trauma. Polyclonal antibody was used to stain TGF-beta I and II ligands and receptors. At epiphyseal plate, both ligand and receptor were expressed from each cell in proliferating and maturing zone. But there was no difference between type I and II except expression time. TGF-beta II ligand and receptor were expressed earlier: they were expressed mostly by the cells at the zone of proliferating cartilage but TGF-beta1 ligand and receptor were expressed mostly hy the cells at zone of maturing cartilage. At fracture site, TGF-beta expression was observed from 3rd day after trauma and it reached its maximum intensity at 2 weeks. It decreased thereafter and disappeared at 6 weeks after trauma. In enchondral ossification area, TGF-beta expressing cells were scattered throughout the enchondral mass. In intramembranous ossification area, the ligands and receptors were expressed from the osteohlasts just heneath the periosteum. ln summary, TGF-beta ligands and receptors were expressed at epiphyseal plate and fracture callus. There was no difference between TGF-beta 1 and 2 expres.ion except the appearance time at epiphyseal plate. We could not draw any conclusion about ligand and rcceptor mechanism with this immunohistochemical staining.
Animals ; Bony Callus* ; Cartilage ; Femur ; Growth Plate* ; Ligands* ; Periosteum ; Rats ; Receptors, Artificial ; Transforming Growth Factor beta ; Transforming Growth Factor beta1

Acute necrotizing encephalopathy (ANE) is a rare immune-mediated complication of a viral infection commonly involving the bilateral thalamus and has been reported mainly in children. Here, we describe the MRI findings of coronavirus disease 2019 (COVID-19)-associated ANE in two pediatric patients, including a 7-year-old girl with fever and mental change, and a 6-year-old girl with fever and generalized seizures. Brain MRI revealed symmetrical T2 fluid attenuated inversion recovery high-signal intensity lesions in the bilateral thalamus with central hemorrhage. In one patient, the thalamic lesions showed a trilaminar pattern on the apparent diffusion coefficient map. This report emphasizes the importance of creating awareness regarding these findings in patients with COVID-19, particularly in children with severe neurological symptoms. Furthermore, it provides a literature review of several documented cases of COVID-19 presenting with bilateral thalamic hemorrhagic necrosis, suggesting a diagnosis of ANE.

Acute necrotizing encephalopathy (ANE) is a rare immune-mediated complication of a viral infection commonly involving the bilateral thalamus and has been reported mainly in children. Here, we describe the MRI findings of coronavirus disease 2019 (COVID-19)-associated ANE in two pediatric patients, including a 7-year-old girl with fever and mental change, and a 6-year-old girl with fever and generalized seizures. Brain MRI revealed symmetrical T2 fluid attenuated inversion recovery high-signal intensity lesions in the bilateral thalamus with central hemorrhage. In one patient, the thalamic lesions showed a trilaminar pattern on the apparent diffusion coefficient map. This report emphasizes the importance of creating awareness regarding these findings in patients with COVID-19, particularly in children with severe neurological symptoms. Furthermore, it provides a literature review of several documented cases of COVID-19 presenting with bilateral thalamic hemorrhagic necrosis, suggesting a diagnosis of ANE.

Acute necrotizing encephalopathy (ANE) is a rare immune-mediated complication of a viral infection commonly involving the bilateral thalamus and has been reported mainly in children. Here, we describe the MRI findings of coronavirus disease 2019 (COVID-19)-associated ANE in two pediatric patients, including a 7-year-old girl with fever and mental change, and a 6-year-old girl with fever and generalized seizures. Brain MRI revealed symmetrical T2 fluid attenuated inversion recovery high-signal intensity lesions in the bilateral thalamus with central hemorrhage. In one patient, the thalamic lesions showed a trilaminar pattern on the apparent diffusion coefficient map. This report emphasizes the importance of creating awareness regarding these findings in patients with COVID-19, particularly in children with severe neurological symptoms. Furthermore, it provides a literature review of several documented cases of COVID-19 presenting with bilateral thalamic hemorrhagic necrosis, suggesting a diagnosis of ANE.

Central nervous system(CNS) involvement by tuberculosis is uncommon in comparison to the involvement of other systems. Untreated tuberculous meningitis is characterized by progressive stupor and a fatal outcome within 4 to 8 weeks of the onset of symptoms. So rapid detection of Mycobacterium tuberculosis is of vital importance for these patients. In almost all patients with tuberculous meningitis, acid-fast bacteria are undetectable in the CSF. Culture techniques that permit the identification of the isolated mycobacterial species require several weeks. We report a case of tuberculous meningitis with intracranial tuberculoma in 8-year old male who experienced pleural effusion, repeatedly. CSF findings did not reveal diagnosis tuberculous meningitis. In MRI study, multiple intracranial tuberculomas were located at the cerebellum. Prolonged treatment with anti- tuberculous chemotherapy and high-dose corticosteroids led to complete recovery.
Adrenal Cortex Hormones ; Bacteria ; Cerebellum ; Child ; Culture Techniques ; Diagnosis ; Drug Therapy ; Fatal Outcome ; Humans ; Magnetic Resonance Imaging ; Male ; Mycobacterium tuberculosis ; Pleural Effusion* ; Stupor ; Tuberculoma* ; Tuberculoma, Intracranial ; Tuberculosis ; Tuberculosis, Meningeal

Clinical study was made on 675 cases of newborn infant who were born by vacuum extraction during the period of January 1971 through December 1975. The results obtained were as follows: 1. The incidence of vacuum extraction among 4,153 deliveries was 16.3% and there was a slight decreasing tendency annually. 2. The highest maternal age incidence was 26 to 30 years of age and vacuum extraction rate was higher in primipara (75.6%) than multipara (24.4%). 3. There were more male (62.2%) than female (37.8%) and 91.6% of the infants were born with 40 to 41 weeks of gestational age and 89.3% of in infants weighing between 2,500 to 4,000g at birth. 4. The majority (774.6%) of the newborn infant had good (10) Apgar score at one minute and only 5.6%had score below 7. 5. The major complication was head injuries and which were 91.1% of increased size of caput succedaneum, 3.1% of scalp abrasion, 3.4% of cephalhematoma, 0.3% of intracranial hemorrhage, and 0.3% of linear skull fracture, Visible jaundice was found in 9.0% of the newborn infants among those 80.3% showed total serum bilirubin level of 15mg/100ml or less, 19.7% showed 20mg/100ml or more but there was no case of severe jaundice required exchange transfusion.
Apgar Score ; Bilirubin ; Craniocerebral Trauma ; Female ; Gestational Age ; Humans ; Incidence ; Infant ; Infant, Newborn* ; Intracranial Hemorrhages ; Jaundice ; Male ; Maternal Age ; Parturition ; Scalp ; Skull Fractures ; Vacuum*