1.Molecular Mechanism of GnRH Interaction with GnRH Receptor in an Evolutionary Viewpoint.
Jae Young SEONG ; Hyuk Bang KWON
Journal of Korean Society of Endocrinology 2000;15(6):779-790
No Abstract Available.
Gonadotropin-Releasing Hormone*
;
Receptors, LHRH*
2.Albendazole Therapy for Multiple Neurocysticercosis.
Journal of Korean Neurosurgical Society 1990;19(10-12):1422-1425
Albendazole is a new drug for the treatment of cerebral cysticercosis. We have recently experience a case that had shown poor therapeutic response to praziquantel. The patient have multiple parenchymal cysts. She was treated with 15mg/kg/day of albendazole for 1 month to confirm healing of the intracranial lesion by the follow up brain CT scan and CSF-ELISA associated with marked clinical improvement.
Albendazole*
;
Brain
;
Cysticercosis
;
Drug Therapy
;
Follow-Up Studies
;
Humans
;
Neurocysticercosis*
;
Praziquantel
;
Tomography, X-Ray Computed
3.Cell surface antigenic relationship of pathogenic mycobacteria.
Hyuk Han KWON ; Saito HAJIME ; Sang Jae KIM
Tuberculosis and Respiratory Diseases 1993;40(5):483-494
No abstract available.
Antigens, Surface*
4.The Distibution of Malassezia Yeasts on Normal Human Skin by Culture study Using the Swabbing Technique.
Hyuk Cheol KWON ; Sung Ho KANG ; Han Uk KIM
Korean Journal of Dermatology 1999;37(1):46-56
BACKGROUND: The distribution of Malassezia yeasts on normal human skin was varied according to the age and race of the volunteers and the methodologies used. In Korea, most reports of Malassezia yeast distribution have relied on direct skin smears rather than culture methods. OBJECTIVE: The aim of this work was to perform a comprehensive survey of the distribution of Malassezia yeasts on normal human skin to provide a base line for a companion study of Malassezia yeasts in patients with various dermatoses. METHODS: Malassezia yeasts were cultured using the swabbing technique from the scalp, forehead, chest, upper back, upper arm and upper thigh in 137 subjects, infancy to 80 years of age. RESULTS: Malassezia yeasts were present in the lowest incidence(0-30%) on six sites of infants and present in 60.0-66.7% on the sebum-rich sites (scalp, forehead, chest, upper back) of children aged 1-9. Malassezia yeasts were present in 80.0-86.7% on the sebum-rich sites of the elderly group(over 60 years of age), about the same frequency as in the middle-aged groups. The population density of these organisms was significantly higher on the upper back than on the forehead, chest, upper arm and upper thigh in all age groups except the infant group and the group aged 1 to 9 (p<0.05). There were no regular quantitative variations in the distribution of Malassezia yeasts on a given site between age groups. On Leeming and Notman media, besides three morphotypes of Malassezia yeasts reported by Cunningham et al(1990), one additional type was identified. CONCLUSION: The results showed regional variations in the distribution of Malassezia yeasts in all ages except infancy and no regular age variations on a given site. Additionally, four colony types of Malassezia yeasts were found. The findings of our study coold help to investigate the role of Malassezia yeasts in related disorders.
Aged
;
Arm
;
Child
;
Continental Population Groups
;
Forehead
;
Friends
;
Humans*
;
Infant
;
Korea
;
Malassezia*
;
Population Density
;
Scalp
;
Skin Diseases
;
Skin*
;
Thigh
;
Thorax
;
Volunteers
;
Yeasts*
5.The Distribution of Malassezia Yeasts on Normal Human Skin by Culture Study Using the Scrub-wash Techique.
Hyuk Cheol KWON ; Sung Ho KANG ; Han Uk KIM
Korean Journal of Dermatology 1999;37(1):38-45
BACKGROUND: Cutaneous vasculitis associated with viral hepatitis seems to occur as a hypersensitivity reaction against the circulating viral antigens. Hepatitis B virus(HBV)-encoded X antigen(HBxAg) is known to participate in the carcinogenesis of hepatocellular carcinoma(HCC) by the inactivation of p53. However, HBxAg has been found in chronic infiammatory lesions without the overexpression of p53. Accordingly, not only EBsAg and HBcAg but also HBxAg may be involved in HCC-associated cutaneous vasculitis, regardless of the alteration of p53. OBJECTIVE: This study was conducted to investigate the expression of HBV-encoded antigens in cutaneous vasculitis accompanied by HBV hepatopathy. Additionally, we have compared the expression of 3 HBV antigens and p53 between vasculitic patients with HCC and in others showing HCC-non-associated vasculitis. METHODS: Immunohistochemically, we examined the expression of HBsAg, HBcAg, and HBxAg in the tissue specimens taken from the vasculitic lesions of the 33 HBsAg-positive enrolled patients with cutaneous vasculitis proven by skin biopsy. RESULTS: 1. The immunohistochemical positivity rate to HBsAg in vasculitic patients with HBV hepatopathy was 66.7% overall. It was 90% in HCC-associated vasculitic subjects and 56.5% in the vasculitic subjects without HCC, respectively. 2. We found the expression of HBxAg in 80% of the vasculitic subjects showing HCC. The vasculitic patients without HCC showed 17,3% of the positivity rate to HBxAg. 3. We could not find the overexpression of p53 in the vasculitic tissue specimens of the HCC patients without the cutaneous metastasis from primary HCC. CONCLUSION: HBsAg, HBcAg and HBxAg may participate in the pathogenesis of cutaneous vasculitis with HBV hepatopathy, regardless of tumorigenesis.
Antigens, Viral
;
Biopsy
;
Carcinogenesis
;
Hepatitis
;
Hepatitis B
;
Hepatitis B Core Antigens
;
Hepatitis B Surface Antigens
;
Humans*
;
Hypersensitivity
;
Malassezia*
;
Neoplasm Metastasis
;
Skin*
;
Vasculitis
;
Yeasts*
6.A Case of Solitary Cutaneous reticulohistiocytoma.
Hyuk Cheol KWON ; Han Uk KIM ; Chull Wan IHM
Korean Journal of Dermatology 1989;27(6):777-780
Solitary cutaneous reticulohistiocytoma is a type of reticulohistiocytosis. The cytoplasm of tumo cells characteristically shows abundant eosinophilic "ground-glass" appearance. We report a case of this rare cutaneous tumor in a 54-year-old woman. It was present as a single nodule on the right index finger of the patient for seven years.
Cytoplasm
;
Eosinophils
;
Female
;
Fingers
;
Histiocytosis, Non-Langerhans-Cell*
;
Humans
;
Middle Aged
7.5-Fluorouracil, Leucovorin ( FL ) Combination Chemotherapy in Advanced or Recurrent Colo - rectal Cancer.
Jeong Hwan CHO ; Hyuk Chan KWON ; Hyo Jin KIM
Journal of the Korean Cancer Association 1999;31(5):1003-1010
PURPOSE: We studied the effectiveness and toxicities of 5-fluorouracil+leucovorin, combination chemotherapy in advanced or recurred colo-rectal cancer patients, who didn't have previous chemotherapy and enrolled from August 1993 to July 1998. MATERIALS AND METHODS: All patients were treated with leucovorin followed by 5-fluorouracil for 5 consecutive days every 4 weeks. Among 43 patients who were enrolled, 40 patients received treatment at least 2 courses, and they were evaluable. Male to female ratio was 21 to 19. In serum CEA level, 27 patients were greater than 5 ng/ml and 13 were less than 5 ng/ml. And primary site was colon in 21 patients and rectum in 19 patients. RESULTS: The complete response rate was 7,5% and the partial response rate was 25%. The median survival duration was 14.7 months, the median response duration was 16.0 months, and median time to progression was 7.3 months. In the analysis of response, survival duration, time to progression according to various characteristics of patients, serum CEA level and liver involvement were revealed significant difference in survival duration, time to progression (p=0.0122, 00350 & 0.0202, 0.0123) on univariate analysis, but no significant difference on multivariates. Hematologic and non-hematologic toxicities were mild and tolerable. CONCLUSION: This study indicates that the combination of 5-fluorouracil (370 mg/m) and leucovorin (20 mg/m) is effective and tolerable regimen in advanced or recurred colo-rectal cancer patients without previous chemotherapy.
Colon
;
Drug Therapy
;
Drug Therapy, Combination*
;
Female
;
Fluorouracil*
;
Humans
;
Leucovorin*
;
Liver
;
Male
;
Rectal Neoplasms*
;
Rectum
8.Primary Tuberculous Complex at the Site of Intralesional Corticosteroid Injection.
Chull Wan IHM ; Hyuk Cheol KWON ; Seon Pill CHOI
Annals of Dermatology 1989;1(1):37-39
No abstract available.
9.Treatment of Congenital Hemangiomata with Intralesional Corticosteroid.
Jae Il SUH ; Hyuk Cheol KWON ; Chull Wan IHM
Korean Journal of Dermatology 1989;27(2):177-186
Sixteen cases of congenital hemangiomata were treated with intralesional corticosteroid injectinn and followed up for 3 to 48 months. They consisted of 9 cases of strawberry hemangiomata with soft consistency, 4 cases of strawbery hemangiomata with firm consistency and 3 cases of cavernous hemangiomata. The results were as follows : 1) All the soft strawberry hemangiomata showed excellent response with marked shrinkage by single treatment. 2) The firm strawberry hemangiomata showed poor response with visible shrinkage after five times treatment, in average. 3) Among three cases of cavernous hemangiomata, one case with large palpable blood vessels in the lesion showed poor response, and two cases without palpable blood vessels in the lesion showed good response. 4) Temporary atrophy and pallor of the skin color were noticed in about half of the cases. Considering the concern of the patients parents, course of the hemangiomata., and the simplicity and effects of the treatment, this therapeutic method is regarded useful in the management of congenital hemangiomata, especially in soft st r awberry hemangiomata.
Atrophy
;
Blood Vessels
;
Fragaria
;
Humans
;
Pallor
;
Parents
;
Skin
10.Ulnar Nerve Injury Caused by the Incomplete Insertion of a Screw Head after Internal Fixation with Dual Locking Plates in AO/OTA Type C2 Distal Humerus Fractures.
Jae Hyuk SHIN ; Whan Jin KWON ; Yoon Suk HYUN
Clinics in Shoulder and Elbow 2017;20(4):236-239
After dual plating with a locking compression plate for comminuted intraarticular fractures of the distal humerus, the incidence of ulnar nerve injury after surgery has been reported to be up to 38%. This can be reduced by an anterior transposition of the ulnar nerve but some surgeons believe that extensive handling of the nerve with transposition can increase the risk of an ulnar nerve dysfunction. This paper reports ulnar nerve injuries caused by the incomplete insertion of a screw head in dual plating without an anterior ulnar nerve transposition for AO/OTA type C2 distal humerus fractures. When an anatomical locking plate is applied to a distal humeral fracture, locking screws around the ulnar nerve should be inserted fully without protrusion of the screw because an incompletely inserted screw can cause irritation or injury to the ulnar nerve because the screw head in the locking system usually has a slightly sharp edge because screw head has threads. If the change in insertion angle and resulting protruded head of the screw are unavoidable for firm fixation of fracture, the anterior transposition of the ulnar nerve is recommended over a soft tissue shield.
Head*
;
Humeral Fractures
;
Humerus*
;
Incidence
;
Intra-Articular Fractures
;
Surgeons
;
Ulnar Nerve*