Fibrohistiocytic tumors are a diverse group of benign and malignant soft tissue lesions, including dermatofibroma, dermatofibrosarcomaprotuberans, and malignant fibrous histiocytoma. On the clinical point of view, the distinction between benign and malignant lesions and malignancy grading is far more important. Therefore, we investigated 23 fibrohistiocytic tumors, using PCNA (PC10) which was a useful marker of proliferating activity, to differentiate the benign lesions from the malignant and correlate with other prognostic factors including tumor necrosis. cellularity, histologic grade, and mitotic counts. The results obtained were as follows 1) Positive tumor cells were clearly identified by the characteristic diffuse or granular nuclear staining. 2) The number of PCNA-positive tumor cells were 2.16+/-2.39% in dermatofibroma, 16.12+/-7.38% in dermatofibrosacoma protuberans, and 28.02+/-17.47% in the malignant fibrous histiocytoma. The numbers of PCNA-positive tumor cells in the malignant lesions higher than in the benign (p<0.001). 3) Deep seated, large size (>5 cm) and recurred or metastatic cases of MFH were more the high PCNA index (more than 20%) than the low index (less than 20%) groups. 4) PCNA index in MFHs had positive correlation with the number of mitotic counts (r=0.7582, p<0.001), cellularity (r=0.5908, p<0.05) and histologic grade (r=0.4164, p<0.05). These results suggested that reactivity on PCNA might assist in the distinction between benign and malignant lesions in fibrohistiocytic tumors, and could be a useful prognostic factor in the patients with malignant fibrous histiocytoma.
Neoplasm Metastasis

Perigraft seroma is uncommon complication of polytetrafluoroethylene(PTFE) grafts applied as an arteriovenous shunt for hemodialysis. It is a collection of clear, sterile fluid confined to nonsecretory fibrous pseudomembrane, most commonly localized around the middle and distal portion of graft. The possible etiologic factors of perigraft seroma include poor graft incorporation, mechanical graft damage caused by alcohol and povidone-iodine, intraoperative streching of the graft, variations in quality control at the time of manufacture and contributing factors such as anemia and coagulopathy in uremia. The best strategy for management of perigraft seroma is not clear. spiration or drainage alone is not effective, and some authors advocate graft removal. We report a case of perigraft seroma around arterial end of PTFE graft along with a brief review of the literatures.
Anemia ; Drainage ; Humans ; Polytetrafluoroethylene ; Povidone-Iodine ; Quality Control ; Renal Dialysis* ; Seroma* ; Transplants ; Uremia

To fine out the changes of DNA ploidy and cellular proliferation activity during carcinogenesis and evaluate correlation between flow cytometrically determined S-phase fraction and proportion of proliferation cell nuclear antigen(PCNA, PC10) immunoreactive cells, the authors studied on malignant fibrous histocytoma induced by intra-articular injection of 9, 10-dimethy1-1, 2-benzanthracene(DMBA) in the rats. Forty Wistar rats were used. The results obtained were as follows. 1) Firstly, tumors were palpated 5 weeks after the last injection of DMBA and formed in 27 rats at sacrificed. Histologically, these lesions showed storiform, indicative of malignant fibrous histiocytoma. 2) Three cases of DNA aneuploidy were observed at 4 and 5 months after the last injection of DBMA and one of them, which was DNA diploidy at main mass, was found at daughter mass. 3) Flow cytometrically determined S-phase fraction and proportion of PCNA(PC10) immunoreactive cells in malignant fibrous histiocytoma induced by DMBA were much higher than in control groups and slightly increased according to sequential changes after formation of mass. The comparison of flow cytometrically determined S-phase fraction and proportion of PCNA(PC10) immunoreactive cells showed significant correlation(r=0.6092, p<0.001). Above results strongly suggest that ploidy pattern may evolve into aneuploid type during the development of tumor and proliferation activity increases during the carcinogenesis.
Rats ; Animals

Intestinal metaplasia and dysplasia of the stomach have been stressed as precursors of gastric carcinoma of the intestinal type, although their preneoplastic nature is still debated. In this study, the cytomorphometric and cytokinetic spectra of the suggested preneoplastic and neoplastic lesions of the stomach were investigated. From the resected stomachs of early gastric carcinoma of intestinal type, areas of normal, intestinal metaplasia, dysplasia, and carcinoma were selected. They were immunostained for proliferating cell nuclear antigen, counterstained with propidium iodide, and various nuclear parameters were measured by image analysis. Normal and intestinal metaplastic mucosae differed by the localization of proliferation zone, but not by nuclear profile area, circular shape factor, and proliferation index. In dysplasia, proliferation zone covered large parts of the dysplastic area. Nuclear profile area and proliferation index were larger whereas circular shape factor was smaller than in normal or intestinal metaplasia. Carcinomatous lesion had diffuse proliferation activity, the largest nuclear profile area and proliferating index, and circular shape factor in-between those of normal or intestinal metaplasia and dysplasia. The above results showed a structural spectrum among normal of intestinal metaplasia, dysplasia, and carcinoma of intestinal type in cytomorphometric and cytokinetic terms. The structural spectrum raises the possibility that dysplasia of the stomach is a preneoplastic lesion.

No abstract available.
Diagnosis, Differential*

No abstract available.
Diagnosis, Differential

The c-erbB-2 oncogene, which is a new human proto-oncogene similar to EGFR structurally, generates a glycoprotein of tyrosine kinase family with a molecular weight of 185,000 To evaluate the prognostic significance of c-erbB-2 oncogene expression in colorectal carcinoma, We analysed 73 colorectal carcinomas in paraffin sections immunohistochemically, using the monoclonal antibody specific for the c-erbB-2 oncogene product and correlated with clinicopathological data. The results were as follows 1) The immunoreactivity for c-erbB-2 oncogene was localized to cell membrane of the tumor cells and occasionally observed within the cytoplasm. 2) The positivity of c-erbB-2 oncogene expression was 71.2%(52/73) of the colorectal carcinomas overall. According to the histological types, the positivity of c-erbB-2 oncogene in adenocarcinoma(77.4%) was higher than that in mucinous carcinoma(36.4%)(p<0.05). 3) Expression of c-erbB-2 oncogene was significantly correlated with lymph node metastasis or distant metastasis(p=0.0117), Dukes stage(p=0.0432), and TNM classification(p=0.0102). These results suggest that c-erbB-2 oncogene expression may be used as a prognostic factor of colorectal carcinoma because of its correlation with other clinicopathological prognostic factors.
Humans ; Neoplasm Metastasis

The objective of the present study was to evaluate the clinical and microbiological effects of scaling and root planing combined with local application of 2% minocycline gel to patients with moderate to advanced chronic adult periodontitis. 27 healthy patients with moderate to advanced chronic adult periodontitis were enrolled in the study. The quadrants that had 2 or more teeth with 5~8mm probing pocket depth and radiographic evidence of alveolar bone loss were selected and divided into test side and control side according to the splitmouth design. All patients received standardized oral hygiene instructions at the beginning of the study. Subsequently scaling and root plaining was performed on all remaining teeth until 0 week. The 2% minocycline gel was applied to periodontal pocket at 0, 1, 2, 3week in the test side. The normal saline was irrigated subgingivally for about 30 seconds in the control side. The clinical and microbiological analysis was carried out at 0, 4, 8, and 12weeks. The results of this study were as follows; 1. 2% minocycline gel delivered subgingivally as an adjunct to scaling and root planing provided benefit in reducing sulcular bleeding index and pocket depth than the use of normal saline. 2. The relative proportion of cocci and non-motile bacteria was increased in the test and control groups with time, and there was no statistically significantdifference between two groups. 3. The proportion of spirochetes was slowly reduced in the control group, but, inthe test group, they were remarkably reduced from the 4th week, and there was a statistically significant difference between two groups. 4. In both groups, the relative proportion of motile rods was notably decreasedat the beginning of the study, and remained until 12th week in the test group,but, in the control group, they were slowly increased from the 4th weekand finally similar to that of the initial examination. In conclusion, local application of 2% minocycline gel may be effective in the clinical and microbiological aspects as an adjunct to scaling and root planing in periodontal disease sites.
Adult ; Male ; Female ; Humans

PURPOSE: Autologous vein graft is the most commonly used conduit for surgical revascularization of the small and medium sized vessels of the coronary and lower extremity circulations. But, 30~50% of these grafts succumb eventually to occlusive failure, often with recurrent morbidity that necessitates reoperation. The cause of failure is the vein graft atherosclerosis from the neointimal hyperplasia, which is the arterial remodeling process through adaptive thickening of the vein wall in response to the increased wall stress. We try to use cis-platin, DNA binding cell cycle specific inhibitory agent, against neointimal hyperplasia in experimental model. METHOD: 5 korean dogs had a autologous vein graft interposition at femoral or carotid arteries using saphenous or jugular veins bilaterally. One side of pairs is treated with cis-platin for one hour (study), while the other is not (conrol). After 4 weeks, we explanted 6 pairs of vein graft (3 jugular veins and 3 saphenous veins), and measured intimal thickness, intimal area and luminal area using videomorphometry, and analysed intimal ratio and luminal ratio. RESULT: Treatment with cis-platin reduced intimal thickness by 44% (P=0.0118) and intimal area by 50% (P=0.0124). Intimal ratio was decreased in the study group when compared to the control group by 0.18 versus 0.66 (P=0.001). The luminal area of the treated grafts was significantly larger than controls, having increased by 823% (P=0.0307), and luminal ratio having increased by 0.82 versus 0.34 (P=0.001). CONCLUSION: These results suggest that cis-platin reduced the development of neointimal hyperplasia in experimental vein grafts. In order to prove the obtained results to a higher degree, an accumulation of further cases is necessary.
Animals ; Atherosclerosis* ; Carotid Arteries ; Cell Cycle* ; DNA ; Dogs ; Hyperplasia ; Jugular Veins ; Lower Extremity ; Models, Theoretical ; Neointima ; Phenobarbital ; Reoperation ; Transplants* ; Veins*

BACKGROUND: The zoonotic disease Q fever is caused by Coxiella burnetii and usually affects high-risk human populations. We conducted a serological survey of dairy cattle farmers in Korea to determine seroreactivity and identify risk factors for C. burnetii infection. METHODS: This cross-sectional study included 1,824 of 7,219 dairy cattle farms (25.3%) in the study region. The selected dairy cattle farmers visited the nearest public health centers or branches with completed questionnaires. Serum samples from the farmers were tested using an indirect immunofluorescence assay to detect phase II C. burnetii immunoglobulin (Ig) G or M antibodies. RESULTS: A total of 1,222 dairy cattle farmers from 784 dairy cattle farms (43.0%) participated in this study, and 11.0% (134/1,222) exhibited seroreactivity, defined as a phase II antigen IgG or IgM titer ≥ 1:16. In the multivariate analysis, male sex, residence in Gyeonggi Province, a larger herd size, and ocular/oral contact with birth products during calf delivery were significantly associated with a higher risk of C. burnetii infection. Furthermore, the risk was significantly lower among farmers who always wore protective gloves while cleaning cattle excretion, compared to those who sometimes or rarely wore protective gloves. CONCLUSION: Dairy cattle farmers should exercise caution by avoiding ocular/oral contact with birth products during calf delivery and by using protective equipment (including gloves).
Agriculture ; Animals ; Antibodies ; Cattle* ; Coxiella burnetii* ; Coxiella* ; Cross-Sectional Studies ; Farmers* ; Fluorescent Antibody Technique, Indirect ; Gloves, Protective ; Gyeonggi-do ; Humans ; Immunoglobulin G ; Immunoglobulin M ; Immunoglobulins ; Korea* ; Male ; Multivariate Analysis ; Parturition ; Public Health ; Q Fever* ; Risk Factors* ; Serologic Tests ; Zoonoses