Increased melanin pigmentation following ultraviolet irradiat.ion is due to increasing tyrosinase activity and multiplicatian of functioning melanocytes. After UV-irradiation, the size of melanocytes increases, and melanocyte dendrites elongatc, and branch. In this experiment, we induced the activation of melanocyts in the epidermis of C57BL black mice by ultraviolet-B(UVB) irradiation and observcd ihe effect of azelaic acid and retinoic acid on the UVB activated epidermal melanocytes. Sixty C57BL black mice were irradiated by UVB 100mJ/cm daily for 10 days, and then azeiaic acid and retinoic acid were topically applied daily for 7 weeks. For the estimation of morphologic change of epidermal melanocytes, light microscopic observation with split DOPA stain was performed at the end of the 1st, 3rd, 5th and 7th week of topical application. The results are summerized as follows : 1. The number, size and circumference of DOPA-positive epidermal melanocytes were significantly decreased in 20% azelaic acid applied group and 30% azelaic acid and 0.05% retinoic acid applied group. 2. In 20% azelaic;i.cid and 0.05% retinoic acid applied group, the number, size and circumference of DOPA-positive epidermal melanocytes were nore significantly decreased than in 20% azelaic acid applied group. In summary, the present study suggets that azelaic acid act as a depigmenting agent on epidermal melanocyte; and such depigmenting effect of azelaic acid was increased by addition of retinoic acid.
Animals ; Dendrites ; Dihydroxyphenylalanine ; Epidermis ; Melanins ; Melanocytes* ; Mice* ; Monophenol Monooxygenase ; Pigmentation ; Tretinoin*

Supracondylar fractures of the femur following total knee arthroplasty are rare complication with reported rates ranging from 0.3% to 2.5%. Union of the fracture in proper alignment, without disruption of prosthetic component fixation and with maintenance of 90 of knee motion, is impotant in treatment of this type of fracture. Modalties of treatment are conservative or operative methods and operative treatment are open reduction 4 internal fixation, intramedullary nailing, revision arthroplasty using a prosthesis with a long stem and closed reduction and external fixation, but there are controversies in the method of treatment. Between Apr. 1989 and Jul. 1994, 10 patients were treated for supracondylar fracture of the ipsilaterai femur following total knee atthroplasty and 2 cases of them had arthrop]asty at other hospital. Average age of patients was 53 years (29-68 years), nine patients were women and one was man. The preoperative diagnosis was rheumatoid arthritis in four, degenerative osteoaithritis in three, posttraumatic osteoarthritis in one and tuberculosis sequelae of the knee in two. In nine cases mechanism of injury were slip down and in one was fall down. The interval hetween arthroplasty and fracture was an average of 22 months (9-79months). Two cases we.re treated with closed reduction and cast immobilization, one case was treated with open eduction and in1ernal fixation and seven patients of' ten cases were treated with closed intramedullay Ender nailing. The average foIlow-up period after fracture was 25 months (3 - 74months). We evaluated the results as the range of motion, bony union at simple radiograph and Knee Rating Score of Hospital for Special Surgery at last follow up. Eight cases of supracondylar fracture occuned among 350 patients, 514 cases of total knee arthroplasty which were operated at Kyung Hee Univcrsity Hospital between Apr. 1989 and Jul. 1994 and incidence was 1.6%. At the last follow up, all 10 cases achieved bony union and 7 cases using Ender naiIing achieved clinical bony union which enabled patients to do weight-bearing without pain at postoperative 6-8 weeks and radiological union was achieved at postoperative 12 weeks. Range of motion were average 105 degrees (80 J.20 degrees) hefore fracture and 86 degrees (6S 120 degrees) at the last follow up and HSS Knee rating score were average 80.3 points (59 94 points) before fracture and average 78.8 points (66-89 points) at the last follow up. At 7 cases using Ender nailing, range of motion were average 106 degrees (90 11S degrees) hefore fracture and 91 degrees (6S-105 degrees) at last follow up and HSS Knee rating score were average 80.6 points (59-94 points) before fracture and average 80.3 points (72-89 poiints) at the last follow up. Closed iintramedullary Ender nailing is a gecommendable operative method in the treatment of supracondylar fracture following total knee arthroplasty considering to good bony union, satisfactory functional result, easy operative technique and less postoperative complication.
Arthritis, Rheumatoid ; Arthroplasty* ; Diagnosis ; Female ; Femur ; Follow-Up Studies ; Fracture Fixation, Intramedullary ; Humans ; Immobilization ; Incidence ; Knee* ; Osteoarthritis ; Postoperative Complications ; Prostheses and Implants ; Range of Motion, Articular ; Tuberculosis ; Weight-Bearing

Leg ; Osteogenesis, Distraction

We analysed 58 patients who were admitted to the Department of Pediatrics, Yonsei University College of Medicine due to infectious mononucleosis from January 1986 to August 1992. Of 58 patients who had responses to IgM to EBV viral capsid antigen and/or heterophil antibody, 35 patients had hapatitis. Of 35 hepatitis patients, group I consisted of 22 patients who had only EBV infection and group II consisted of 13 patients who had hepatitis B markers or cytomegaloviral markers. The results were as follows: 1) Sex distribution revealed males to females to be 1.1:1. In the age distribution, the proportion of patients with 1 to 3 years of age occupied 40.9% for group I and 30.8% for group II. In non-hepatitis group, 73.9% of patients were in 2 months to 3 years of age. 2) The common presenting symptoms and signs of hepatitis group included hepatomegaly in 24 cases (68.6%), fever in 19 (54.3%), anorexia in 17 (48.6%), throat injection in 16 (45.7%), splenomegaly in 5 (42.9%), and cervical lymphadenopathy in 10 cases (28.6%) etc. 3) In group I, complications or combined diseases included pneumonia in 4 case, disseminated intravascular coagulation in 2 and 1 case in acute pancreatitis. Group II included 1 case of iron deficiency anemia, acute renal failure, peritonitis and pulmonary hemorrhage respectively. 4) Anemia (Hb: <10g/dl) was found in 3 cases (13.6%) for group I, and in 2 cases (15.4%) for group II. Leukocytosis above 10,000/mm3 was demonstrated in 15 cases (68.2%)for group I and in 3 cases (23.1%)for group II. The higher percentage (>15%)of atypical lymphocytes were found in 3 cases (13.6%)for group I and in 1 case(7.7%) for group II. Thrombocytopenia (platelet: <100,000/mm3) was detected in 1 case (4.5%) for group I and in 3 cases (23.1%)for group II. Total bilirubin above 1.0mg/dl was found in 6 cases (27.3%)for group I and in 5 cases(58.1%)for group II. 5) AST level of 100~500IU/L was found in 10 cases(45.4%)for group I, and in 5 cases (38.5%) for group II. AST level above 500IU/L was demonstrated in 1 case (4.5%) and in 3 cases (23.1%) respectively. The mean values of AST level were 253.4 455.3IU/L and 316.7 102.4 IU/L, respectively. 6) Elevated ALT level of 100~500 IU/L was found in 9 cases (40.9%)for group I and in 9 cases(69.2%)for group II. ALT level above 500IU/L was detected in 5 cases (22.7%)for group I and in 3 cases (15.4%)for group II. The mean values of ALT level were 356.9 561.2IU/L and 308.3 259.1IU/L, respectively. 7) Elevated ALT levels returned to normal values within 3 weeks in 14 cases (82.4%) for group I and in 6 cases (66.7%)for group II. The mean duration of normalization of ALT level were 17.3 14.1 days for group I and 19.9 14.8 days for group II. Our results suggest that it AST/ALT levels are elevated and hepatitis A, B, C markers are negative, or if sudden elevated AST/ALT levels are noted in hepatitis B carriers or a patient with cytomegaloviral hepatitis, Epstein-Barr virus infection should be suspected.
Acute Kidney Injury ; Age Distribution ; Anemia ; Anemia, Iron-Deficiency ; Anorexia ; Bilirubin ; Capsid ; Disseminated Intravascular Coagulation ; Epstein-Barr Virus Infections ; Female ; Fever ; Hemorrhage ; Hepatitis A ; Hepatitis B ; Hepatitis* ; Hepatomegaly ; Herpesvirus 4, Human ; Humans ; Immunoglobulin M ; Infectious Mononucleosis ; Leukocytosis ; Lymphatic Diseases ; Lymphocytes ; Male ; Pancreatitis ; Pediatrics ; Peritonitis ; Pharynx ; Pneumonia ; Reference Values ; Sex Distribution ; Splenomegaly ; Thrombocytopenia

No abstract available.
Thyroid Gland* ; Thyroid Nodule*

We report our case of laparoscopy-assisted distal gastrectomy with D1 + beta lymph node dissection for a patient with early gastric cancer and laparoscopic cholecystectomy for gallstone with situs inversus totalis. A superficial elevated lesion was found on the lesser curvature of the antrum. The preoperative diagnosis was cStage IA (cT1, cN0, cH0, cP0, cM0). A 1 cm-sized gallstone was found in the fundus through upper abdominal ultrasound. A laparoscopy-assisted distal gastrectomy with standard D2 lymph node dissection for early gastric cancer and laparoscopic cholecystectomy was successfully performed by not shifting the monitor to the left and right and not changing operator's position without additional blood loss and time. The number of retrieved lymph nodes was 36. We have not found any abnormal course of blood vessels except for the right/left inversion. Billroth I reconstruction was performed through end-to-side anastomosis. Based on a histopathological examination, a 1.5 x 1.5 cm, submucosal (sm3), moderately differentiated adenocarcinoma (pT1, pN0, sH0, sP0, sM0, stage IA) was diagnosed. The postoperative course was favorable and the patient was discharged on postoperative day 7.
Adenocarcinoma ; Blood Vessels ; Cholecystectomy, Laparoscopic ; Gallstones ; Gastrectomy ; Gastroenterostomy ; Humans ; Lymph Node Excision ; Lymph Nodes ; Organothiophosphorus Compounds ; Situs Inversus ; Stomach Neoplasms

No abstract available.
Adhesives*

No abstract available.
Child* ; Humans ; Purpura*

No abstract available.
Angiomyoma*

No abstract available.
Eosinophils* ; Humans ; Parotid Gland* ; Radiotherapy*