The gastric carcinoma shows various molecular and genetic alterations in its development and progression. There are evidences that the changes of the expression of cell adhesion molecules affect the morphogenesis of the tumor as well as the tumor progression and metastasis. The purpose of this study is the evaluation of the expression pattern of a cell adhesion molecule, E-cadherin, and a tumor suppression gene, p53, by immunohistochemical stain and the relationship of their expressions with clinicopathologic findings in gastric adenocarcinoma tissue. The E-cadherin expression was absent or reduced in 93 cases (73.2%) and p53 was positive in 98 cases (77.2%) of 127 gastric adenocarcinomas. The frequency of reduced E-cadherin expression was significantly higher in poorly differentiated adenocarcinomas (p=0.04) and in diffuse type (p=0.01), but that of p53 positivity was not significantly correlated with tumor differentiation. Both proteins showed no correlation with depth of invasion, lymph node and distant metastasis, and tumor stage. There was no correlation between E-cadherin and p53 expression. This study indicates that the altered expressions of E-cadherin and p53 are associated with the development of intestinal and diffuse types of gastric adenocarcinoma and the differentiation of the gastric adenocarcinoma is affected by cell adhesion mediated by E-cadherin, but the modes of tumor progression and metastasis are not affected by E-cadherin and p53.
Adenocarcinoma* ; Cadherins* ; Cell Adhesion ; Cell Adhesion Molecules ; Genes, p53 ; Immunohistochemistry ; Lymph Nodes ; Morphogenesis ; Neoplasm Metastasis ; Stomach Neoplasms

Elastofibroma is a peculiar tumor-like lesion which manifests as a slowly growing, solid, ill-defined mass of fibroelastic tissue occurring almost exclusively in elderly persons. It has been found in the ,,ubscapular region but rare examples have also been found in other locations. We experienced a case of elastofibromatous lesion of the stomach. The lesion was incidentally found in a 71 -year-old woman during an operation of cholecystectomy due to chronic cholecystitis and choledocholithiasis. The lesion was a relatively well-defined but not encapsulated small nodule, 0.7 cm in diameter, at submucosal layer of gastric pylorus. Histologically the nodular mass consisted of abundant acellular collagen fibers containing numerous elastofibroma fibers.
Female ; Humans

Peripheral T-cell lymphoma is the generic group given to a family of tumors composed of neoplastic lymphocytes with phenotypic features of peripheral T-cells. Certain peripheral T-cell lymphomas develop a hemophagocytic syndrome that mimics malignant histiocytosis, both clinically and pathologically. We experienced a case of nasal T-cell lymphoma, histologically mimicking malignant histiocytosis in a 40-year-old male. The chief complaints were nasal obstruction and intermittent mild fever. Mild anemia, elevated SGOT and SGPT, polyclonal gammophthy, and moderate hepatomegaly were present. Two weeks later was present an enlarged cervical lymph node. The biopsied nasal mass showed angiocentric and angiodestructive peripheral T-cell lymphoma withextensive necrosis and marked erythrophagocytosis by non-neoplastic histiocytes. Subsequently, cervical lymph node was biopsied, which showed peripheral T-cell ltmphoma with extensive necrosis and erythrophagocytosis as well. The atypical lymphoid cells revealed pan-T(+), but CD4(-) and CD8(-), whereas the reactive histiocytes showed lysozyme(+), immunohistochemistry.

Rosai-Dorfman disease (RDD) is a rare type of benign histiocytosis characterized histologically by intracellular engulfment of lymphocytes. Extranodal RDD may occur as a part of generalized process involving lymph nodes or may involve extranodal sites independent of the lymph node status. We have experienced a case of extranodal Rosai-Dorfman disease of the nose as an initial lesion prior to nodal involvement. The patient was a 20-year-old woman who complained of nasal obstruction for 4 years, remotely, and left submandibular mass for 3 months, recently. Histologically, the lesion taken from nasal cavity, submandibular gland and left upper jugular lymph node all showed an heavy infiltrate consisted of plasma cells, lymphocytes and sheets of macrophages with abundant pale cytoplasm, which replaced organ architecture. The associated focal fibrosis made it difficult to differentiate from inflammatory pseudotumor. Some macrophages demonstrated phagocytosis of lymphocytes, plasma cells and occasionally neutrophils. The macrophages were strongly positive for S-100 protein.
Cytoplasm ; Female ; Fibrosis ; Granuloma, Plasma Cell ; Histiocytosis ; Histiocytosis, Sinus* ; Humans ; Lymph Nodes ; Lymphocytes ; Macrophages ; Nasal Cavity ; Nasal Obstruction ; Neutrophils ; Nose* ; Phagocytosis ; Plasma Cells ; S100 Proteins ; Salivary Glands* ; Submandibular Gland ; Young Adult

An immunohistochemical stain for p53 tumor suppressor gene product was performed in 59 primary lung cancers to study the relation between its expression and type of the tumor, degree of tumor differentiation,clinical stage and smoking. The results were as follows: 1. The expression of mutant p53 protein was noted in 28 of 59 cases(47.5%) of primary lung cancers. The p53 protein was expressed in 21 of 35(60%) squamous cell carcinomas, in 6 of 21(28.6%) adenocarcinomas, and 1 of 1(100%) small cell carcinoma. There was a significant difference in expression of p53 among the different histologic types of lung cancer(p<0.05). 2. The incidence of p53 protein expression did not correlate with the degree of tumor cell differentiation or the clinical stage of lung carcinoma(p>0.05). 3. The incidence of p53 protein expression was higher in smokers(current: 75%, former: 46.2%) than in non-smokers(5.6%) and was increased in direct proportion to the pack years. There was a statistically significant correlation between p53 expression and smoking(p<0.05). The mutation of p53 gene may often be an early event in the development of lung cancer and it is suggested that the smoking known as a risk factor for the development of the lung cancer may be associated with the transformation of p53 tumor suppressor gene into mutant p53 gene or oncogene.
Incidence ; Risk Factors ; Genes, Tumor Suppressor ; Lung Neoplasms

Immunohistochemical stains for bcl-2 oncoprotein and PCNA and examination of the mitosis level were perfon-ned in 76 cases of cervical intraepithelial neoplasia (CIN). We studied the expression pattern of bcl-2 protein according to histologic grades and the function of bcl-2 oncogene associated with cellular proliferation by comparing with PCNA expression and the mitosis level. The results were as follows: 1) Of 76 cervical intraepithelial neoplasias, 23 (30.3%) were CIN I, 23 (30.3%) were CIN II, and 30 (39.4%) were CIN III. 2) Of 23 CIN I cases, grade 0 and 1 mitosis level were seen in 20 (87.0%), PCNA in 16 (69.6%), and bcl-2 in 19 (82.6%) cases, respectively, which indicates that CIN I lesions have a low cellular proliferative activity. 3) Of 30 CIN III cases, grade 2 and 3 mitosis level were noted in 28 (93.3%), PCNA in 25 (83.3%) and bcl-2 in 19 (63.3%) cases, respectively, which indicates that CIN III lesions have a high cellular proliferative activity. The results suggest that progressive increase of dysfunctional proliferative activity and abnormal decrease of cell death result in increased number of neoplastic cells according to CIN grade. Also the expression rate of bcl-2, PCNA and mitosis level were significantly different between CIN I and 111, which suggest that they might be good parameters for classifying CIN into low and high grade and for prediction of the biologic behavior of the CIN lesion.

Alterations of the mucin-type glycoproteins may contribute to changes in cancer cell growth regulation, immune regulation, and cellular adhesion, which in turn may influence the invasive and metastatic capabilities of the cancer. Many of the cancer-associated antigens such as mucin antigens have been identified recently and alterations in the glycosylation of the mucins have been described in the cancer. Immunohistochemical studies of 3 antigens associated with alteration of the mucin glycoprotein (MUC1, MUC2, STn) were done to evaluate their relationship with known pathologic prognostic factors and their usefulness in assessment of the progression of gastric carcinoma in 127 gastric carcinoma tissues. The MUC1 was detected in 57 (44.9%), MUC2 in 76 (59.8%) and STn antigen in 77 (60.6%) out of 127 cases of gastric carcinomas. The expression rate of MUC1 was significantly correlated with depth of tumor invasion, lymph node and distant metastases, and advanced tumor stage (p=0.001). The expression rate of MUC2 was not significantly correlated with pathologic findings and known prognostic factors. The STn antigen was significantly associated with incidence of lymph node metastasis (p=0.02). The coexpression of both MUC1 and MUC2 or MUC1 and STn was more frequent in tumors with deep invasion, lymph node metastasis and advanced tumor stage than one or none expression (p<0.05). These results suggest that the alterations of expression of the mucin proteins, especially MUC1 and carbohydrate antigen (STn) are associated with poor biological behavior of the gastric carcinoma.
Glycoproteins* ; Glycosylation ; Immunohistochemistry ; Incidence ; Lymph Nodes ; Mucins* ; Neoplasm Metastasis

Hemangiopericycic maningioma is clinically and pathologically similar to peripheral Hemangiopericytoma and now tends to be terned as hemangiopericytoma of central nervous system. The authors studied 3 cases of hemangiopericytic meningioma obtained from 3 patients, 1 case of meningotheliomatous meningioma, angioblastic meningioma and transitional meningioma, and 2 cases of peripheral hemangiopericytoma, which had operated from November 1988 to May 1989 at the department of neurosurgery, Pusan Inje University Hospital. The authors analysed and compared the immunohistochemical finding and light microscopic apearance. The results obtained were summarized as follows; 1) Classic maningioma (meningotheliomatous meningioma, transitional meningioma and angioblastic meningioma) shows reactivity to both EMA and vimentin. 2) Hemangiopercicytic meningioma and peripheral hemangiopericytoma are reactive only to vimentin, so the two tumors are suggested as same type of tumor. 3) One of 3 cases of hemangiopericytic meningioma shows whorling and interlacing bundles of spindle cells, the peculiar light microscopic features of transitional meningioma, suggesting transitional or mixed form of hemangiopericytic meningioma and transitional meningioma.
Meningioma

Hemangiopericycic maningioma is clinically and pathologically similar to peripheral Hemangiopericytoma and now tends to be terned as hemangiopericytoma of central nervous system. The authors studied 3 cases of hemangiopericytic meningioma obtained from 3 patients, 1 case of meningotheliomatous meningioma, angioblastic meningioma and transitional meningioma, and 2 cases of peripheral hemangiopericytoma, which had operated from November 1988 to May 1989 at the department of neurosurgery, Pusan Inje University Hospital. The authors analysed and compared the immunohistochemical finding and light microscopic apearance. The results obtained were summarized as follows; 1) Classic maningioma (meningotheliomatous meningioma, transitional meningioma and angioblastic meningioma) shows reactivity to both EMA and vimentin. 2) Hemangiopercicytic meningioma and peripheral hemangiopericytoma are reactive only to vimentin, so the two tumors are suggested as same type of tumor. 3) One of 3 cases of hemangiopericytic meningioma shows whorling and interlacing bundles of spindle cells, the peculiar light microscopic features of transitional meningioma, suggesting transitional or mixed form of hemangiopericytic meningioma and transitional meningioma.
Meningioma

An immunohistochemical stain for the Rb tumor suppressor gene product was performed in pathologic specimens from 72 primary lung cancer patients to study the correlation between its expression and histologic type, cancer differentiation, clinical stage and survival rate. The expression of the Rb protein was positive in 34 cases(47.2%) and negative in 38 cases(52.8%). The Rb protein was not expressed in 16 of 42 cases(38.1%) in squamous cell carcinoma, in 17 of 23 cases(73.9%) in adenocarcinoma, in one of three cases(33.3%) in undifferentiated large cell carcinoma, in two of two cases(100%) in small cell carcinoma, in one of one case(100%) in an adenosquamous carcinoma and in one of one case(100%) in an atypical carcinoid. There were significant difference of the Rb protein expression between squamous cell carcinoma and adenocarcinoma(p<0.05). The expression of Rb protein was not correlated with degree of cancer cell differentiation and clinical stage of the lung cancer(p>0.05). The two year survival rate for patients with the Rb positive was 65% compared with 37% for those with the Rb negative which was significant(p<0.05). This result suggests that an altered or the absence of the Rb protein in cancer cells can be a valuable prognostic factor in the lung cancer.
Adenocarcinoma ; Carcinoid Tumor ; Carcinoma, Adenosquamous ; Carcinoma, Large Cell ; Carcinoma, Small Cell ; Carcinoma, Squamous Cell ; Cell Differentiation ; Genes, Tumor Suppressor ; Humans ; Lung Neoplasms* ; Lung* ; Prognosis* ; Retinoblastoma Protein* ; Survival Rate