No abstract available.
Adenocarcinoma* ; Flow Cytometry*

The p53 gene is believed to play an important role through the mutation and overexpression in the progression of various human malignant tumors. The type IV collagenase (matrix metalloproteinase: MMP-2) initiates the degradation of the extracellular matrix, and consequently may play a role in the tumor invasion and metastasis. To investigate the correlation between clinicopathologic features of the colorectal adenocarcinomas and benign tumors and expression of p53 and MMP-2 proteins, we performed an immunohistochemical study on 40 colorectal adenocarcinomas, 20 adenomas and 20 hyperplastic polyps by using the antibodies to p53 and MMP-2 proteins. The positive expression rate of the p53 protein in adenocarcinomas was 62.5% and significantly higher than in benign tumors. The positive expression rate of the MMP-2 protein was 47.5% in adenocarcinomas, but there was no expression of MMP-2 protein in benign tumors. The difference in p53 and MMP-2 expression rates between malignant and non-malignant tumors was statistically significant. The positive expression rate of p53 protein in the non-metastatic and metastatic adenocarcinomas was 59.1 and 66.7%, respectively. The positive expression rate of MMP-2 protein in the non-metastatic and metastatic adencarcinomas was 45.5 and 50.0%, respectively. The correlation between several clinicopathologic features and expression of p53 and MMP-2 protein was not statistically significant, but the rate of positive MMP-2 immunoreactivity showed a statistically significant difference between Astler-Coller stage B1 C1 group and B2 C2 group of adenocarcinoma (p=0.0431). We concluded that the expression of p53 and MMP-2 protein contributes to the cancer development and MMP-2 may play a certain role in the invasiveness of the colorectal tumor. p53 and MMP-2 protein expression is not correlated with lymph node metastasis.
Adenocarcinoma* ; Adenoma ; Antibodies ; Collagenases ; Colorectal Neoplasms ; Extracellular Matrix ; Genes, p53 ; Humans ; Lymph Nodes ; Matrix Metalloproteinase 2* ; Neoplasm Metastasis ; Polyps

The pulmonary cavernous hemangioma is usually from birth and there may be without symptoms until adulthood. Larger or multiple pulmonary angiomata with considerable pulmonary arteriovenous shunts may cause cyanosis, finger clubbing, dyspnea and frequently accompanyingbruit. Recently, we experienced a case of cavernous hemangioma of the lung. A 34-year-old woman was admitted to our hospital for surgical evaluation of a 4 cm solitary, round nodule in the right upper lobe on the chest X-ray and CT scan. She had no symptoms. Laboratory findings are within normal limits except for elevated glucose levels. At surgery, the mass was well encapsulated and easily excised from the peripheral portion of the posterior segment of the right upper lobe. Grossly, it consisted of a 4 cm in diameter, round, soft, sponge-like, hemorrhagic, slightly lobulated mass with a smooth external surface. Microscopically, the mass was composed of vessels, which were thin walled, dilated and filled with blood. The wall of the abnormal vessels was thin and composed of endothelium and fibrous connective tissue with only a little smooth muscle. Immunohistochemically, the wall of the dilated abnormal vessesls showed negative reaction for cytokeratin(low and high) and epithelial membrane antigen but weakly positive reaction for UEA-1 in focal areas.
Adult ; Male ; Female ; Humans ; Hemangioma

No abstract available.
Red-Cell Aplasia, Pure*

Transitional cell carcinoma of the urinary bladder is the most common cancer of the genitourinary tract in Korea and its prognosis is determined by the histologic grade and clinical stage present at initial diagnosis. Recently, an extensive search for a more objective and reproducible method to evaluate the proliferation activity of cancer cells has been done. The p53 gene is located on the short arm of the chromosome 17 and acts as a cancer suppressor gene. Mutant p53 gene induces malignant transformation. Recent studies reveal that the level of mutant p53 protein is elevated in some human tumor and many diverse transformed cell lines. Heat shock proteins(HSPs) are present constitutively in normal cells, where they play an important role in normal cell metabolism. In mammalian cells, they are induced by a variety of physical and chemical stimuli. A protein that belongs to the hsp70 family, called hsc70, is only slightly heat inducible and is found at a higher level in growing cells than in the resting cells. The mutant p53 protein binds with hsc70 and the p53-hsc70 complex has functional significance in the transforming capacity of the mutant p53. We investigated the correlation between the p53 and hsc70 by immunohistochemical methods and with better defined prognostic indicators such as histologic grade, clinical stage, and DNA ploidy pattern in 42 transitional cell carcinomas of the urinary bladder. The results are summarized as follows. p53 expression rate was higher in the DNA aneuploid group than in the DNA diploid group(p=0.061), but there was no significant difference in the histologic grade(p=0.861) or clinical stage(p=0.154). The higher the hsc70 expression rate was, the poorer the tumor differentiation(p=0.000) and the deeper the invasion(p=0.001). The aneuploid group showed a higher hsc70 expression rate than the diploid group(p=0.017). 27 of 42(64.3%) carcinomas showed positivity of both p53 and hsc70. Though statistically insignificant, their correlation showed a relatively low correlation coefficient (P=0.059). In conclusion, we suspect that p53 and hsc70 are closely correlated to each other by comparing the results of this immunohistochemical study, and hsc70 will be a useful prognostic marker in transitional cell carcinomas of the urinary bladder after sufficient follow up studies are performed.
Humans ; Follow-Up Studies ; Genes, p53

This is a report of the clinico-pathologic findings in six cases of histologically verified malignant meningiomas-three hemangiopericytic and three anaplastic types. They were three males and three females and two of them were reoperated for recurrence. The hemangiopericytic types had similar angiographic and macroscopic features and malignant characteristics such as increased mitoses. The anaplastic types lacked typical arrangement, but had a large number of mitoses, increased cellularity, focal necrosis, pleomorphism, anaplasia, and the adjacent normal parenchymal infiltration. However the metastasis was not yet proven in these cases.
Female ; Male ; Humans ; Neoplasm Metastasis

This is a report of the clinico-pathologic findings in six cases of histologically verified malignant meningiomas-three hemangiopericytic and three anaplastic types. They were three males and three females and two of them were reoperated for recurrence. The hemangiopericytic types had similar angiographic and macroscopic features and malignant characteristics such as increased mitoses. The anaplastic types lacked typical arrangement, but had a large number of mitoses, increased cellularity, focal necrosis, pleomorphism, anaplasia, and the adjacent normal parenchymal infiltration. However the metastasis was not yet proven in these cases.
Female ; Male ; Humans ; Neoplasm Metastasis

Midline malignant reticulosis is a relentlessly progressive, localized, destructive inflammatory process of upper respiratory tract including the nose, nasopharynx, palate, paranasal sinuses, and midface. Histologically, it is characterized by a dense aceumulation of pleomorphic mononuclear cells with an admixture of inflammatory cells. We report a case of midline malignant reticulosis developed in a 64-year-old man, who showed a serosanguineous nasal discharge, perforation of nasal septum, persistent ulceration of hard palate, and disseminated lesions on the abdominal skin, which was confirmed by histopathalogical examination. In addition we studied infiltrated cells with atypical nuclei by immunohistochemical staining with a pannel of monoclonal antibodies. The results revealed that the atypical cells expressed the T-cell marker, but not the macrophage and B-cell marker.
Antibodies, Monoclonal ; B-Lymphocytes ; Humans ; Macrophages ; Middle Aged ; Nasal Septum ; Nasopharynx ; Neoplasm Metastasis* ; Nose ; Palate ; Palate, Hard ; Paranasal Sinuses ; Respiratory System ; Skin* ; T-Lymphocytes ; Ulcer

Forty-four ovairan tumors were immunohistochemically studied for the presence of broad-spectrum keratin, vimentin, desin, carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP), and alpha 1-antitrypsin (AAT) in formalin-fixed, paraffin-embedded tissues. 1) Among the common epithelial tumors, all the serous carcinomas (4) expressed keratin and AAT, and one additionally CEA. Six mucinous carcinomas exhibited keratin-positivity in two. One endometrioid carcinoma coexpressed keratin and vimentin as well as AAT, but one clear cell carcinoma expressed only keratin. Keratin-and CEA-positivity in epithelial cell nests and vimentin-positivity in stromal cells were observed in two Brenner tumors. Two undifferentiated carcinomas showed keratin-positivity in one and focal CEA positivity in the other. 2) In sex cord-stromal tumors, four out of six granulsa cell tumors, all four thecomas and three fibromas expressed vimentin, and two granulosa cell tumors and two thecomas showed AAT-positivity. The others were negative. 3) Among germ cell tumors, four dysgerminomas showed focal vimentin-positive cells in two and diffuse staining for AAT. Seven endodermal sinus tumors expressed AAT in all. Additionally, AFP were positive in two and CEA in three out of them. One embryonal carcinoma expressed CEA, AAT and AFP. 4) In four metastatic carcinomas, three exhibited keratin-and CEA-positivity, whereas one exhibited keartin-and vimentin-positivity. All showed AAT-positivity. 5) There was no positive case for desmin among ovarian tumors.
Neoplasm Metastasis

Three case of plexiform schwannoma displayed multinodular masses and microscopically a multicentric pattern of growth featuring Antoni A cellular component, Verocay bodies and presence of Antoni B areas. Clinically von Recklinghausen's disease was not observed in all cases. The first patient was a 17 year old male who had a protruding nodule of walnut size which was located at the dermis of the left flank for 13 years. The second case, a 25 year old male, had an irregular whitish brown multinodular mass in the choana for 5 years. The last case, a 56 year old woman, had an ovoid yellowish brown mass with multiple nodules in the retroperitoneum.
Female ; Male ; Humans