No abstract available.
Carcinoma, Merkel Cell* ; Epidermal Cyst* ; Immunosuppression

No abstract available.
Ear* ; Pilomatrixoma*

PURPOSE: To evaluate the differential features of complete and partial- thickness tears of the posterior cruciate ligament(PCL) and to describe associated knee injuries at magnetic resonance imaging(MRI). MATERIALS AND METHODS: Twenty-four subjects were studied, including 15 with complete PCL tears and 9 with partial PCL tears. The PCL status was determined at arthroscopy in all cases. Knee MRI were perfomed at 1.0 Tesla using a dedicated knee surface coil. Two radiologists retrospectively reviewed MR images and correlated MRI findings to results of arthroscopy. RESULTS: There was no statistically significant difference between complete tears and partial tears with regard to thickness, margination, and signal intensity of the PCL. However, complete tears were more likely to show focal areas of ligamentous discontinuity(13/15:3/9, p=0.0073). Associated knee injuries were seen in 22 (92%) patients and were seen more frequently in patients with complete PCL tears, which were bony injuries (n=16, 67%), tears of the medial collateral ligament(n=12, 50%) and menisci(n--11, 46%), and stage III joint effusion(n=17, 71%). CONCLUSION: The most useful MRI criteria for distinguishing complete from partial PCL tear is focal area of ligamentous discontinuity, that is, complete tears are more likely to show focal areas of discontinuity, whereas partial tears are more likely to show at least some intact fibers.
Arthroscopy ; Humans ; Joints ; Knee ; Knee Injuries ; Ligaments ; Magnetic Resonance Imaging* ; Posterior Cruciate Ligament* ; Retrospective Studies

No abstract available.
Amino Acids* ; Dentin* ; Tooth*

The provision of adequate soft tissue cover for a complex hand and forearm wound-dirty, infected and exposed bone can be a challenging problem. Conventionally, a distant flap or free flap have been used, but these have been associated with several problems such as joint stiffness, risk of microsurgical procedures, negligible donor site morbidity, prolonged operation time and economic restriction. As well, fasciocutaneous flap has been the limitation of infection control. In these situations, the ipsilateral muscle flap provides the ideal cover with its rich blood supply and single operative field. Previously described by Lendrum(1980), by Lae et al.(1981), and later by McGeorge(1991), the brachioradilis muscle is the most superficial muscle on the radial side of the forearm. Its flap is based on the radial artery and venae comitantes. From August 1996 to October 1997, we performed branchioradialis muscle flap in seven patients. Despite the sacrifice of the major hand artery, brachioradialis muscle flap has many advantages including the reliability of flap survival, easy dissection, early mobilization and absence of functional and aesthetic problems at the donor site. It is a relatively simple and rapid method for resurfacing soft tissue defect in the hand and forearm. We obtained satisfactory and reliable results.
Arteries ; Early Ambulation ; Forearm* ; Free Tissue Flaps ; Hand* ; Humans ; Infection Control ; Joints ; Radial Artery ; Tissue Donors

PURPOSE: To establish signal intensity characteristics of the trachea according to the histologic layers, we performed in vivo and in vitro MR studies. MATERIALS AND METHODS: We performed MR imaging of the trachea at 1.5T unit in 11 patients mediastinal masses, vascular anomalies, tracheal stenosis or iatrogenic tracheoesophageal fistula, aryepiglottic fold thickening or mass, tracheal carcinoid, one healthy volunteer and one cadaveric trachea. By using anterior, volume neck or 3 inch dual coil with various pulse sequences, axial and coronal images of the trachea were obtained. The tracheal layers with different signal intensity on MR images were correlated with the histology. RESULTS: In vivo and in vitro MR studies revealed two layers of the trachea ;the inner layer had intermediate to high signal and the outer had low signal. The tracheal cartilage showed low signal intensity in all pulse sequences. The submucosa appeared as intermediate signal intensity on T1 weighted images but high signal intersity on other images due to its abundant mucous and mucoserous glands. However, the mucosa and perichondrium could not be defined on MR images. CONCLUSION: Characterization of the signal intensity according to the histologic layers of the trachea might be helpful for the evaluation of intrinsic lesions of the irachea or the possibility of tracheal invasion from the adjacent tumors.
Cadaver ; Carcinoid Tumor ; Cartilage ; Healthy Volunteers ; Humans ; Magnetic Resonance Imaging* ; Mucous Membrane ; Neck ; Trachea ; Tracheal Stenosis ; Tracheoesophageal Fistula

No abstract available.
Humans ; Pregnancy, Twin*

The attitude toward the use of autopsies affects the incidence of performance of the procedure. In foreign countries, many studies on this subjects have been conducted. However, in Korea, no study has been reported. We hypothesized that the general university students may be negative, whereas the medical college students may have positive attitude toward the use of autopsies. In contrary to our hypothesis, there existed only a little difference for the attitude toward conducting an autopsy between the general university students and the medical students. Both groups had positive attitudes toward autopsy. When the medical students become medical doctors, the main reason for not requesting patients to be conducted an autopsy is that their family members may feel offended. These results show that the low incidence of autopsy cases in Korea is caused not by the attitude of the general population, but by the attitude of medical doctors. Thus, we should make every effort to increase the incidence of autopsy by educational programs and discussions about autopsy and death.
Autopsy* ; Humans ; Incidence ; Korea ; Students, Medical

OBJECTIVE: To assess the association with autoimmune endocrine diseases and detection rate of autoimmune antibodies and its clinical significance in patients with premature ovarian failure. METHODS: Twenty eight patients with primary or secondary amenorrhea manifesting hormonal and clinical features of premature ovarian failure (primary POF: 7, secondary POF: 21) were investigated. We tested them TFT, 75 g OGTT, ACTH and S-cortisol for thyroiditis, IDDM, Addison's disease, and antithyoglobulin antibody, antimicrosomal antibody, antinuclear antibody, rheumatic factor, anti-smooth muscle antibody, anti-acetylcholine receptor antibody for non-organ specific autoimmune disorders. RESULTS: Only one patient was diagnosed as IDDM and no patients had abnormal TFT or adrenal function test. More than one kind of autoantibody was detected in 11 patients of all (39.2%): 5 patients (71.4%) of primary POF group and 6 patients (21.4%) of secondary POF group. Eleven patients (39.3%) had antithyroglobulin antibody, 4 (14.3%) had antimicrosomal antibody, 2 (7.1%) had antinuclear antibody, 2 (7.1%) had rheumatic factor, 1 (3.6%) had anti-smooth muscle antibody, 1 (3.6%) had anti-acetylcholine receptor antibody. CONCLUSIONS: Premature ovarian failure may occur as a component of an autoimmune polyglandular syndrome, so patients should be measured with free thyroxine, thyroid-stimulating hormone, fasting glucose and electrolytes. Measurement of thyroid autoantibodies in POF patients may be important in identifying patients at risk of developing overt hypothyoidism, but other autoantibodies may not be suitable for screening test.
Addison Disease ; Adrenocorticotropic Hormone ; Amenorrhea ; Antibodies ; Antibodies, Antinuclear ; Autoantibodies ; Autoimmune Diseases* ; Diabetes Mellitus, Type 1 ; Electrolytes ; Endocrine System Diseases ; Fasting ; Female ; Glucose ; Glucose Tolerance Test ; Humans ; Mass Screening ; Primary Ovarian Insufficiency* ; Thyroid Gland ; Thyroiditis ; Thyrotropin ; Thyroxine

Soft tissue tumor is defined as a tumor occurring in voluntary muscles, fat, fibrous tissue, along with the vessels serving these tissue and peripheral nervous system. It is difficult to make a diagnosis by conventional microscopic observation because of their pleuripotentiality and similar growth characteristics. Although their morphological findings of tumors are similar to one another, their clinical courses, treatment and prognosis are different. So early, correct diagnosis and proper treatment are neccessary. The present study is aimed to evaluate a value of immunoperoxidase staining to make definite diagnosis of soft tissue tumors and its application to surgical pathology. The material consisted of 106 cases of fibrohistiocytic tumors and malignant soft tissue tumors which are morphologically similar to malignant fibrohistiocytic tumors for 5 years period lasting from 1980 to 1984 at the Department of Pathology, Yonsei University College of Medicine. After the classificationof fibrohistiocytic tumors by the Enzinger (1983), clinical finndings were reviewed and peroxidase antiperoxidase(PAP) method with alpha1-antichymotrypsin was done in 15 cases of all fibrohistiocytic tumors. Other soft tissue tumors which were difficult to differentiate from MFH by light microscopic observation were liposarcoma, rhabdomyosarcoma, fibrosarcoma and malignant schwannoma. These 21 cases of tumors including MFH were stained with PAP method for alpha1-antichymotrypsin, S-100 protein and myoglobin. Results obtained were as follows: 1) The cases on study consisted of 19 cases of malignant fibrous histiocytoma, 2 dermatofibrosarcoma protuberans, 45 fibrohistiocytic tumors and 11 other benign fibrohistiocytic tumors. 2) The male to female ratio was 1 : 1.8 in benign and intermediate group of fibrohistiocytic tumor, but 2.2 : 1 in malignant histiocytic tumor. 3) Most cases of benign fibrohistiocytic tumors were occurred in 4th and 5th decade of life. Intermediate and malignant fibrohistiocytic tumors were mostly found in late adult life and their mean age was 43.6 year. 4) The most common sites were trunk and both extrimities in benign fibrohistiocytic tumors(88.9%), but head, neck and lower extremities in MFH (78.9%). Two cases of dermatofibrosarcoma protuberans were occurred in turnk and upper extremity. 5) The PAP stain for alpha1-antichymotrypsin was done in 15 cases of 77 fibrohistiocytic tumors which included MFH, dermatofibrosarcoma protuberans, xanthoma, xanthofibroma, dermatofibroma showed variable degree of positivity to alpha1-antichymotrypsin. The positivity of alpha1-antichymotrypsin revealed no significant difference according to differentiation of the tumors, such as benign, intermediate and malignant. 6) The PAP stain for alpha1-antichymotrypsin revealed diffuse positivity in all cases of MFH and also in a case of malignant schwannoma, fibrosarcoma, liposarcoma and rhabdomyosarcoma, but myoglobin and S-100 protein were negative. In three cases of leiomyosarcoma, two of rhabdomyosarcoma and three of malignant schwannoma, alpha1-antichymotrypsin, S-100 protein and myoglobin were negative, although a few positive tumor cells were present, which may the considered as metatypci differentiation. Another possibility of this discordance was loss of antigenicity by improper procedure of paraffin embedding and poor differentiation of tumor cells. In summary, PAP method for specific tumor marker is important for proper diagnosis of soft tissue tumors, and application to surgical pathology.
Adult ; Male ; Female ; Humans ; Tumor Markers, Biological