PURPOSE: The purpose of this study was to compare the two-dimensional with three-dimensional radiographic measurements of polyethylene liner wear in the Harris-Galante II acetabular cup. MATERIALS AND METHODS: We measured the polyethylene liner wear amount and the wear rate of 64 hips with Harris-Galante II acetabular cup by two methods: Livermore's method and modified Devane's method. We evaluated the relationships between the two methods. RESULTS: The average total amount of wear and the average wear rate are 0.86+/-1.01 mm and 0.18+/-0.20 mm/year using the two-dimensional method and 0.99+/-1.01 mm and 0.21+/-0.2 mm/year using three-dimensional method respectively. The amount of wear and the wear rate by the three-dimensional method was larger than those by the two dimensional method. CONCLUSION: The amount of polyethylene liner wear can be measured by the two-dimensional method because it is highly correlated with the amount that is measured by the three-dimensional method, since there was no differences between the two methods.
Acetabulum* ; Hip ; Polyethylene*

Congenital dermal sinuses result from a failure of separation of the cutaneous epithelial ectoderm from the neuroepithelial ectoderm along the dorsum of the embroy during the first month of intra-uterine life. These sinus tracts can occur at any level of the cerebro-spinal axis, but are located predominantly in the occipital and lumbosacral regions and occasional cases involving the cervical and thoracic regions. The dermal sinus tract is lined by stratified squamous epithelium and extends from the surface through the deeper tissues into the cranial or spinal cavity, usually ending on the dura or within the dura in conjunction with a terminal epidermoid or dermoid cyst. An intra-medullary epidermoid or dermoid with a dermal sinus is an unusual association. We have been able to find a previously reported coincidence of these malformations although there are many definitive papers on these uncommon entities. We are experienced in one case who are 14 months old boy with a intra-medullary dermoid cyst associated with a congenital dermal sinus at the T4 level, and reviewed related reports.
Axis, Cervical Vertebra ; Dermoid Cyst* ; Ectoderm ; Epithelium ; Humans ; Infant ; Lumbosacral Region ; Male ; Spina Bifida Occulta*

PURPOSE: To analyze the effects of implant design on the primary stability and the contact between bone and prosthesis of three different porous coated acetabular implants. MATERIALS AND METHODS: The distal part of sixty bovine femurs were employed. 52 mm acetabular cups were inserted tightly after 2mm under-reaming. Trilogy acetabular cups were inserted in Group I, Mallory head finned RingLoc cups in Group II, Duraloc spiked cups in Group III. The gaps between the acetabular cups and the bones were measured on the radiography. The axial compression test and rotation test were performed using Instron. RESULTS: The gaps between the acetabular cup and bone of Gorup I and II was significantly smaller than Group III at its central adjacent and peripheral area (p<0.05) . The gap at the mid-portion decreased in order of Group I, II and III (p<0.05) . At the rim of the acetabular cup there was no measurable gap in all three groups. In the axial load of 300Kp, the mean micromotions were no statistical significances among three groups (p>0.05) . The mean torque of 1 degree rotation test was higher in the Group III than in the group I and II without statistical significance (p>0.05) . The mean torque of 2, 3 and 5 degree rotation test was highest in Group II among three, but there were no statistical differences among three groups (p>0.05) . CONCLUSION: Triology and Mallory-Head cup can be assumed to have better primary stability than Duraloc cup. And additional fin or spikes attached on the acetabular implant couldn't enhance the primary bone-prosthesis interface stability.
Acetabulum* ; Femur ; Head ; Prostheses and Implants ; Radiography ; Torque

The authors reported 100 cases of acute subdural hematomas confirmed by operation from Jan. 1972 to Sept. 1975. We discussed the relationship of the type of operation to mortality in acute subdural hematomas. The types of surgical operations were divided in 4 groups. The surgical mortality rate was 19% for frontotemporoparietal craniotomy, 29% for multiple burr holes technique, 42% for craniectomy and 48% for subtemporal decompression with burr holes and total over-all mortality was 36% in our cases. The authors reviewed the literatures described the surgical operative method and it's mortality and so we thought large frontotemporoparietal craniotomy is more valuable method for operation of the acute subdural hematomas.
Craniotomy ; Decompression ; Hematoma, Subdural, Acute* ; Mortality

Ureteropelvic junction avulsion caused by blunt trauma is a rare condition which is often diagnosed after some delay. Herein, we report a case of traumatic ureteropelvic junction avulsion which has been treated successfully by end to end pyeloureterostomy.
Kidney Pelvis ; Ureter ; Wounds and Injuries

The stress fracture is a disease which results from the repeated application of an abnormal stress to the normal bone, typically occurs in metatarsal bone, tibia, fibular and femur, but medial malleolus is rare. We report a case of stress fracture of medial malleolus in 22-year old wrestler.
Animals ; Ankle ; Athletes ; Athletic Injuries ; Femur ; Fractures, Stress ; Humans ; Metatarsal Bones ; Tibia

Schwannoma, also known as a neurilemmoma, neurinoma, and perineural fibroblastoma, can be either a benign or malignant tumor, arising from the associated nerve sheath. A retroperitoneal malignant schwannoma is a rare tumor. Immunohistochemical staining for S-100, leucine-7 and the myelin basic protein is useful for diagnosis. Here we report a case of retroperitoneal malignant schwannoma with a brief review of the literatures.
Diagnosis ; Myelin Basic Protein ; Neurilemmoma*

The most common cause of pain in the distribution of sciatic nerve is a herniated lumbar disc, Spinal stenosis, intrapelvic masses, and diabetic neuropathy may also produce scitica-like symptom. Infrequently, Piriformis syndrome is a rare disease causing sciatica produced by entrapment of sciatic nerve by the piriformis muscle as it passes through the sciatic notch. Recently we experienced a case of piriformis syndrome to be successfully treated by exploration of sciatic nerve and sectioning of fibrous band between piriformis muscle and gluteus maximus muscle. We would describe the clinical feature of a piriformis syndrome, and review other literatures.
Diabetic Neuropathies ; Piriformis Muscle Syndrome* ; Rare Diseases ; Sciatic Nerve ; Sciatica ; Spinal Stenosis

The aim of this study was to develop a rapid and safe non-radioactive DIG DNA labeling and detection for Southern blot analysis for fragile X syndrome and Duchenne muscular dystrophy (DMD). Southern blot analysis is accurate test showing expression of the (CGG)n repeat and abnormal methylation pattern of CpG island in hagile X syndrome, and good confirmative secondary test in case of deletion in DMD. But in terms of test rapidity, these conventional radioactive Southern analysis may not be feasible for rapid screening of prenatal samples and at-risk populations to determine their status and to provide genetic counseling to their families. As an alternative radioactive Southern blotting, DIG DNA labeling and detection system does not require handling of radioactive material nor require learning any new technology. The complete procedure of labeling the DNA and hybridization to detection of the first visible signal can be compbsbed witbin 7 days. In addition, hybridization solutions containing labeled DNA can be reused several times after renewed denaturation.
Blotting, Southern ; CpG Islands ; Diagnosis* ; DNA ; Fragile X Syndrome* ; Genetic Counseling ; Humans ; Learning ; Mass Screening ; Methylation ; Muscular Dystrophy, Duchenne

We report a rare case of an epididymal adenomatoid tumor in a 31-year-old man who had a slowly growing painless left scrotal mass for approximately two years. Physical examination revealed a rubbery, non-tender, 2x2cm sized mass located in the tail of the epididymis. Scrotal ultrasonography showed a 1.7x1.7cm sized isoechogenic mass inferior to the left testicle. Left epididymectomy done. The diagnosis was confirmed by a surgical excision and a subsequent histological analysis.
Adenomatoid Tumor* ; Adult ; Diagnosis ; Epididymis* ; Humans ; Male ; Physical Examination ; Testis ; Ultrasonography