Mutations in the p53 gene occur during the development of colorectal carcinomas, and play an important role in the conversion of adenoma into carcinoma. To detect the p53 gene mutation and its pattern of expression in colorectal carcinomas, polymerase chain reaction for exons 5, 6, 7, and 8, recombinant gene cloning, and automated DNA sequencing were performed with 30 fresh colorectal carcinomas. Each tissue was also analyzed by immunohistochemical staining for p53 protein. p53 protein was detected in 25 of 30 (83.3%) colorectal carcinomas by immunohistochemical study. p53 mutation was detected in 4 of 30 (13.3%) colorectal carcinomas. The distribution of these mutations among these exons investigated was as follows: Three mutations in exon 5 (66.7%) and 1 mutation in exon 7 (33.3%). One case with mutation in exon 5 had mutations at three different codons. Mutations in exon 5 were found at codon 153 (GGG to AGG: Gly to Arg), 170 (TGC to GGC: Cys to Gly), 186 (CTA to TTA: silent mutation), 158 (GCG to ACG: Ala to Thr), and 176 (ACG to ATG: Thr to Met). Mutation in exon 7 was found at codon 248 (AGG to AGA: silent mutation). Four of them were missense mutations. Two of 6 mutations were silent mutations. Five transition mutations and 1 transversion mutation were also detected. All cases with mutations by automated DNA sequencing showed positive p53 protein immunohistochemical stainining. In conclusion, p53 gene mutation was detected in 4 of 30 (13.3%) colorectal carcinomas, located in codon 153, 158, 170, 176, and 186 of exon 5 and codon 248 of exon 7. Further studies are needed to evaluate the significance of the codon 153 mutation which was not recognized in other studies on colorectal carcinomas.
Adenoma ; Clone Cells ; Cloning, Organism ; Codon ; Colorectal Neoplasms* ; DNA* ; Exons ; Genes, p53* ; Mutation, Missense ; Polymerase Chain Reaction ; Sequence Analysis, DNA*

No abstract available.
Blood Coagulation* ; Pulmonary Embolism* ; Tissue Plasminogen Activator*

The expression of p62"' and p2l can be seen in many solid tumor, but the pattern and incidence of expression were different according to organ, countries, and examiners, thus it is not definitely defined. Total 67 colorectal carcinoma in paraffin sections are analysed by immunohistochemically for evaluation of the p62and p21- expression according to the age, sex, chief complaints, location, differentiation, modified Dukes stage, using the specific monoclonal antibodies. The results were summarized as follows : The age of patients ranged from 32 years to 82 years. The mean age was 57.6 years. The expression of p 62y' and p21 was not correlated with age. Male was 29 cases(43.3%) and female was 38 cases(56.7%). The male to female ratio was 1:1.31. The and 95.0% in moderately differentiated adenocarcinoma, 90.0% and 90.0% in poorly differentiated <,;, adenocarcmoma, 100.0% and 100.0% in mucinous carcinoma. The positive rate of p62!and and p2l' was 94.1% and 88.2% in Dukes stage B,, 96.0% and 96.0% in Dukes stage B,, 100.0% and 100.0% in Dukes stage C,, 100.0% and 88.9% in Dukes stage C, and 100.0% and 100. o% in Dukes stage D. The expression of p62 y' in metastatic colorectal carcinoma showed diffuse and strongly positive reaction than primary colorectal carcinoma. The expression of p21 in primary colorectal carcinoma showed diffuse and strongly positive reaction than metastatic colorectal carcinoma.
Adenocarcinoma ; Adenocarcinoma, Mucinous ; Antibodies, Monoclonal ; Colorectal Neoplasms* ; Female ; Humans ; Immunohistochemistry ; Incidence ; Male ; Oncogene Proteins* ; Oncogenes* ; Paraffin

The aortic dissection is an acute aortic syndrome, caused by an intimal tear and subsequent splitting of the media by the pulsatile blood flow. Though there would be differences in the origin of aortic dissection and therapeutic modalities, the intermediate and long-term prognoses are poor. Endovascular Stent-graft implantation is a revolutionary technique in the treatment of aortic dissection. The endovascular stent grafting in aortic dissection is less invasive and feasible method and is an effective tool for closing the entry site and promoting clot formation, reducing the size of the false lumen. Therefore, endovascular Stent-graft implantation makes possible the desirable remodelling of aorta. We report 33 year-old male with aortic dissection in the thoracic aorta, which was treated with endovascular Stent-graft implantation. Over the favorable remodelling, his dissection was healed completely by the endovascular treatment using Stent-graft.
Adult ; Aorta ; Aorta, Thoracic* ; Blood Vessel Prosthesis ; Humans ; Male ; Prognosis

A case of Korean hemorrhagic fevery confirmed by fluorescent antibody technique in a 8years old boy was reported with a brief review of references.
Fluorescent Antibody Technique* ; Hemorrhagic Fever with Renal Syndrome* ; Humans ; Male

No abstract available.
Estradiol* ; Female ; Humans ; Plasma* ; Progesterone*

No abstract available.

A total of 672 surgically resected gastric carcinomas were reviewed, and fourteen cases(2.1%) of "gastric carcinoma with lymphoid stroma" were identified. The tumor was located mostly in cardia and body portion(86%). Thirteen patients one was lost to follow up were alive without recurrence of tumor. Grossly, this carcinoma was characterized by an expanding growth pattern or a multinodular pattern. Histologically, this carcinoma showed an irregular trabecular and alveolar arrangement and densely infiltrated lymphoid cells with lymph follicles. The tumor cell nests were widely separated by non-desmoplastic lymphoid stroma. On immunohistochemical study, T cells were evenly distributed throughout the tumor lesion with intimate contact with individual carcinoma cells, but B cells were mainly present within the germinal centers of lymph follicles. Thus, the organized immune response combined with cell mediated and humoral immunities against the carcinoma cells may be a defense mechanism of the host in this type of gastric carcinoma.

Epidemiological evidence suggests that human papillomavirus(HPV) infection is a high risk factor for the development of oral cancers. Many oncogenes, especially p53 suppressor gene, have a critical role of carcinogenesis in several human cancers including oral cancers. To investigate the prevalence of HPV infection and subtyping of high risk group(HPV-16, -18 and -33) HPV in oral cancers, the author studied 31 cases of squamous cell carcinomas arising from the oral cavity using polymerase chain reaction (PCR). The author also demonstrated the overexpression of p53 oncoprotein in the oral cancers using immunohistochemical methods. The correlation between HPVs infection and p53 overexpression in tumorigenesis of the oral cancers was evaluated. 1. Twenty-one cases(66.7%) among 31 cases of oral squamous cell carcinomas were positive for HPV-DNA. Among them, 16 cases were positive for HPV-16, 4 cases for HPV-18, and 2 cases for HPV-33. Two cases were coinfected with HPV-16 and HPV-18, and HPV-18 and HPV-33. 2. The prevalence of HPV infection appeared not correlated with tumor differentiation and clinical stages of oral squamous cell carcinomas. 3. The overexpression of p53 oncoprotein was present in 24 of 31 cases(77% ). In 21 HPV positive tumors 18 cases were positive for overexpression of p53 oncoprotein. Six cases were positive for p53 in ten HPV negative tumors. There was no correlation between HPV DNA detection rate and p53 overexpression. The above results suggest that HPV infection and p53 oncogene mutation play different roles in tumorigenesis of oral squamous cell carcinomas. No coexpression of p53 oncoprotein with HPV-DNA detection suggests that another etiologic mechanism other than HPV infection may be operative.
Carcinogenesis ; Carcinoma, Squamous Cell* ; DNA ; Genes, Suppressor ; Human papillomavirus 16 ; Human papillomavirus 18 ; Humans* ; Mouth Neoplasms ; Mouth* ; Oncogenes ; Polymerase Chain Reaction ; Prevalence ; Risk Factors

Carcinoma Showing Thymus-Like Differentiation (CASTLE) is a rare tumor, which occurs in the thyroid gland and surrounding soft tissue, or soft tissue of the neck. It is thought to originate from ectopic thymus or branchial pouch remnants. We report a case of CASTLE of the thyroid gland in a 42-year-old woman. Grossly, a nodular, partly well demarcated, grayish yellow, 3.0 2.0 cm sized, solid mass was found in the right thyroid gland. Microscopically, the tumor was divided into lobules of variable size and shape, nests and cords with thin and thick fibrous septa which were infiltrated by lymphocytes and plasma cells. The tumor cells were large, polygonal and had vesicular nuclei with prominent nucleoli and eosinophilic cytoplasm. Some cells, especially in the central portion of the nests had abundant eosinophilic cytoplasm and showed squamoid feature.
Adult ; Cytoplasm ; Eosinophils ; Female ; Humans ; Lymphocytes ; Neck ; Plasma Cells ; Thymus Gland ; Thyroid Gland*