To elucidate the neurotoxic mechanism of methylmercury on cultured bovine oligodendrocytes, neurotoxic effect was estimated by MTT assay after cultures were exposed to various concentrations of methylmercuric chloride (MMC). In addition, neuroprotective effect of antioxidant, allopurinol agonist MMC-induced neurotoxicity was examined on these cultures. Exposure of cultured bovine oligodendrocytes to MMC showed less than 50% of the cell viability 24 hours after treatment with 35µM of MMC. And also, allopurinol blocked the neurotoxicity induced by MMC on these cultures. These results suggest that oxygen radicals involve in MMC-mediated neurotoxicity, and also seletive antioxidants such as allopurinol are effective in blocking the neurotoxicity induced by MMC on cultured bovine oligodendrocytes.
Allopurinol* ; Antioxidants ; Cell Survival ; Neuroprotective Agents ; Oligodendroglia ; Reactive Oxygen Species

There are many procedures for stabilizing the foot but all frail feet, all complete drop feet, and all calcaneocavus deformities due to paralysis are best treated by pantalar fusion. Hunt and Thompson advised one stage pantalar arthrodesis by astragalectomy and replacement of the denuded bone in paraiytic feet resulting from poliomyelitis. At the Presbyterian Medical Center, Jeonju, Korea, 12 one stage pantalar arthrodesis were performed between 1973 and 1978 and following observations were made. 1. Seven of the patient had pantalar fusions because of poliomyelitis. 2. Five feet were equinovarus and 4 had frail feet with varying amounts of varus or valgus of the forepart of the foot and of the heel. 3. Nine patients were considered to have a good result, two had a fair and one was failure 4. Length of immobilization was from 13 weeks to 37 weeks and the average length of immobilization was 17 weeks. 5. In one stage pantalar arthrodesis, there was no complication except one non-union and the period of hospitalization was decreased.
Arthrodesis ; Clubfoot ; Congenital Abnormalities ; Foot ; Heel ; Hospitalization ; Humans ; Immobilization ; Jeollabuk-do ; Korea ; Paralysis ; Poliomyelitis ; Protestantism

Pathologists play an important role in proper evaluation of endoscopically removed polyps of the gastrointestinal tract. This study is purposed to reclassify the polyps and review the clinicopathologic features of each histologic subtypes and their malignant potential. Our material consists of total 345 gastrointestinal polyps obtained from Jan. 1986 to Dec. 1987. The results are as follows: 1) A total of 345 gastrointestinal polyps was removed from stomach is 151 cases, from colon in 180 cases, and from small intestine in 14 cases. 2) Hyperplastic polyps were the most common type of polyps I stomach (53.6%) whereas neoplastic polyps were the most common in colon (56.1%). 3) Hyperplastic polyps of the stomach occur in any age after the 3rd decade of life and neoplastic polyps predominantly developed between the 5th and 8th decades. Juvenile retention polyps were frequently noted before the 3rd decade of age. 4) Approximately 267 cases (77.4%) of patients had a single polyp and the remainders had multiple polyps. The gastric polyps were usually located at the antrum and the colonic polyps were at the sigmoid colon and rectum. 5) Epithelial atypia was exclusively noted in the neoplastic polyps of stomach (72.7%) and colon (72.3%). Malignancy in the polyp was observed in the neoplastic polyps only (13 cases). 6) Different types of polyp may occur in the same organ.

Pathologists play an important role in proper evaluation of endoscopically removed polyps of the gastrointestinal tract. This study is purposed to reclassify the polyps and review the clinicopathologic features of each histologic subtypes and their malignant potential. Our material consists of total 345 gastrointestinal polyps obtained from Jan. 1986 to Dec. 1987. The results are as follows: 1) A total of 345 gastrointestinal polyps was removed from stomach is 151 cases, from colon in 180 cases, and from small intestine in 14 cases. 2) Hyperplastic polyps were the most common type of polyps I stomach (53.6%) whereas neoplastic polyps were the most common in colon (56.1%). 3) Hyperplastic polyps of the stomach occur in any age after the 3rd decade of life and neoplastic polyps predominantly developed between the 5th and 8th decades. Juvenile retention polyps were frequently noted before the 3rd decade of age. 4) Approximately 267 cases (77.4%) of patients had a single polyp and the remainders had multiple polyps. The gastric polyps were usually located at the antrum and the colonic polyps were at the sigmoid colon and rectum. 5) Epithelial atypia was exclusively noted in the neoplastic polyps of stomach (72.7%) and colon (72.3%). Malignancy in the polyp was observed in the neoplastic polyps only (13 cases). 6) Different types of polyp may occur in the same organ.

Cytokeratins are a family of polypeptides of intermediate filaments which in diverse epithelia are expressed in diffeent, yet specific combinations. To evaluate the diagnostic value of keratin, immunohistochemical staining was done in formalin-fixed, paraffin-embedded normal and neoplastic tissues by PAP and StreptABC methods. The antiserum for cytokeratin in monoclonal antibody which gives the specificity for 40, 46, 50, 52, 56, 58, and 65-67 Kd keratin classes. The results are as follows: 1) The staining was positive for cytokeratin in all of the squamous epithelium, ductular epithelial cells of various glands, respiratory and urinary tract epithelium, and mesothelial cells. 2) No staining for cytokeratin was ovserved in respiratory alveolar epithelium, acinar cells of various glands, renal glomeruli, hepatocytes, and many mesoderm-derived tissues such as muscle, hematopoieitc and lymphoid tissues, nerve, bone, cartilage, and fibroblasts. 3) Squamous cell carcinomas, transitional cell carcinomas, mesotheliomas, and some of the adenocarcinomas (stomach, colon, uterine cervix, biliary tract and breast) exhibited positive staining for cytokeratin. Epithelial cells of thymoma, adenomatoid tumor, plemorphic adenoma of salivary gland, papillary carcinoma of thyroid, lymphoepithelioma, and craniopharyngioma were also positive. 4) Some of the adenocarcinomas (prostate and pancreas), renal cell carcinoma, ovarian stromal and germ cell tumors, hepatocellular carcinoma, malignant melanoma, and mesoderm-derived tumors including malignant lymphoma were uniformly negative for staining. 5) From the above results, the immunohistochemical study in paraffin-embedded tissues using monoclonal antibody for cyto keratin may be useful to differentiate various tumors, especially in differential of hepatocellular carcinoma from bile duct adenocarcinoma, lymphoepithelioma and other undifferentiated carcinomas from lymphoma, thymoma from lymphoma, and squamous cell carcinoma from melanoma. It will be helpful in the diagnosis of transitional cell carcinoma in which the differentiation from renal cell carcinoma and prostatic adenocarcinoma be difficult.
Adenocarcinoma ; Adenoma ; Carcinoma, Hepatocellular

30 cases of distal femur fracture were treated with cast-brace for 2 years and 6 months from Feb., 1977 till July, 1979 at the department of Orthopaedic Surgery, Presbyterian Medical Center, in Jeon Ju. The results were obtained as follows: 1. In 9 cases, cast-brace were applied initially and other 21 cases were treated with cast-brace secondarily after operation. 2. 20 cases were male and 10 cases were female. 3. 12 cases were on mid 1/3 fracture and 18 cases were distal 1/3 fracture involving 2 condylar fractures. 4. The average duration of fracture healing was 14.7 weeks in the cases with cast-brace which is compared with 20.7 weeks of hip-spica cast control group. 5. A.G.F. of knee joint was 80–115 degree at removal of cast-brace, otherwise merely 50–65 degree at dlscarding of hip-spica cast. 6. There were no complication such as nonunion or delayed union in the cases with cast-brace.
Braces ; Female ; Femur ; Fracture Healing ; Humans ; Jeollabuk-do ; Knee Joint ; Male ; Protestantism

Harrington Instrumentation is very effective method for treating the unstable thoraco-lumbar spine fracture and fracture-dislocations. Authors performed Harrington Instrumentations in 8 cases of unstable thoraco-lumbar spine fracture and fracture-dlslocations. The results obtained were as follows; 1. Spinal fracture and fracture-dislocations are most common in thoraco-lumbar junction. 2. Laminectomy increases the instability of the spine. 3. Pain was more common in the patient who has severe deformity of the spine. 4. Neurological recovery; a) In case of complete paralysis... returns of useless motor power in 2 of 6 cases. b) In case of incomplete paralysis... complete returns in all 2 patients. 5. Harrington Instrumentation is very effective for restoring the spine stability in unstable fracture and fracture-dislocations. 6. Early mobilization was possible and hospitalization period was shortened by Harrington Instrumentation.
Congenital Abnormalities ; Early Ambulation ; Hospitalization ; Humans ; Laminectomy ; Methods ; Paralysis ; Spinal Fractures ; Spine

Cervical spine injuries are increasing recently due to increasing traffic accidents. Many patients have been treated with cervical laminectomy but stabilization of the cervical spine has been neglected as a part of the treatment. 30 patients with cervical spine injuries who were admitted to our hospital from January 1, 1973 to December 31, 1978 were evaluated. The following observations were made: 1. The ratio between male and female was 2:1 and the majority(43%) were found in the 4th decades. 2. The common causes of cervical spine injuries were traffic accident(40%) and falls(33.3%). The most common site of the lesion was the 5th and 6th cervical spine level (33.3%). 3. Among 30 cases, 10 cases(33.3%) had complete paralysis, 12 cases(40%) incomplete paralysis, 6 cases (20%) had nerve root injury and no neurological change is 2 cases. 4. The mechanisms of cervical injuries were classified morphologically and flexion-rotation injuries (55.5%) were the most common. 5. We evaluated the results of treatment neurological & radiographically. In complete paralysis, there was no neurological improvement and cervical kyphosis increased after laminectomy. In incomplete paralysis and nerve root injury, anterior fusion showed slight neurological recovery but mild cevical kyphosis and displacement of the graft were observed. In posterior fusion or cast immobilization, we had a satisfactory result with a high fusion rate and normal cervical curvature. 6. lt is impossible to compare anterior interbody fusion with posterior fusion for neurological recovery. For early mobilization and rehabilitation, we emphasize early stabilization by anterior or posterior fusion according to the mechanism of injury.
Accidents, Traffic ; Clinical Study ; Early Ambulation ; Female ; Humans ; Immobilization ; Kyphosis ; Laminectomy ; Male ; Paralysis ; Rehabilitation ; Spine ; Transplants

The function of the knee joint is determined by the anatomical integrity of ligamentous structures, however the ligaments and soft tissues which support by the knee joint are too weak to tolerate forceful stresses. The knee joint is one of the most susceptible joints to ligamentous injury. Recently, the incidence of ligamentous injuries of the knee increased because of rise in traffic accidents and participation in sports. For good results, it is very important to make an early diagnosis and to give prompt management. The authors reviewed 67 cases of ligamentous injuries in patients who were admitted and managed at the Department of Orthopaedic Surgery of Presbyterian Medical Center from March of 1976 to December of 1982. The results of the clinical study are as follows: 1. The prevalent age group is the 3rd through 5th decades, and more frequent in males (8. 6 times). 2. The traffic accident is the most common cause of injury (80. 6%) and many ligamentous injuries were associated with fracture (53. 2%). 3. The most common ruptured individual ligament was the medial collateral ligament. The isolated ligamentous rupture of anterior and posterior cruciate ligament was 3 cases each, but most of the cruciate ligaments were combined with other ligament injury. 4. The rupture sites of the individual ligaments were found to be the following: (a) The medial collateral ligament was ruptured most frequently in the mid-substance (45. 2%), with the deep layer ruptured at the femoral attachment and the superficial layer in the mid-substance; (b) The lateral collateral ligament torn at the fibular attachment (62. 5%); (c) The anterior cruciate ligament torn at the femoral and tibial (47. 6%, respectively); (d) The posterior cruciate ligament torn at the femoral attachment (40. 0%). 5. It is significant if the difference between the normal knee and the injured knee on the stress film is more than 10 or 10mm. 6. Excellent and good results were obtained in 95.2% by non-surgical management and in 93.0% by surgical management. 7. Early surgical repairs, made within 2 weeks after injury, gave much better results than late repairs.
Accidents, Traffic ; Anterior Cruciate Ligament ; Clinical Study ; Collateral Ligaments ; Early Diagnosis ; Humans ; Incidence ; Joints ; Knee Joint ; Knee ; Lateral Ligament, Ankle ; Ligaments ; Male ; Posterior Cruciate Ligament ; Protestantism ; Rupture ; Sports

Beurgers disease is a specific, recurrent, segmental, inflammatory, obliterative vascular disease involving principally the medium sized arteries and veins of the extremities. The disease was originally described by Leo Beurger in 1908. The results in treatment were not satisfactory in spite of many interaction and experiencies in treatment. So the present study is clinical analysis of 136 cases of Beurgers disease, who were treated at the Department of Orthopaedic Surgery and General Surgery, Presbyterian Medical Center, for the past 12 years, from 1971 to 1982. The results obtained are as follows: Sex distribution was predominent in male(97.1%) and peak incidence in the fourth decade. One hundred twenty eight cases had smoked over 10 years and sixty percent had more than one operation previously because of the same disease. The most common symptom was pain in the extrimities, necrosis, skin color change and coldness were in that order of frequency. The lower extremities were more commonly involved. The most common site of obstruction at the arteriogram was the popliteal artery. Among the surgery cases, 20 of the sympathetomized patients had followed-up, and the long term result showed improvement in 17 cases and all the results of the vascular surgery were poor.
Arteries ; Clinical Study ; Extremities ; Humans ; Incidence ; Lower Extremity ; Necrosis ; Popliteal Artery ; Protestantism ; Sex Distribution ; Skin Pigmentation ; Smoke ; Thromboangiitis Obliterans ; Vascular Diseases ; Veins