OBJECTIVE: Thyroid nodule is frequent and occurs in about 5+ACU- of the general population. In contrast, thyroid cancer is much less frequent and occurs in about 5-10+ACU- of thyroid nodules. Distinguishing between benign and malignant lesions is an important task that is best accomplished by fine needle aspiration. Recently, Chiappetta et al. reported that the expression of the high mobility group (HMG) I(Y) proteins correlates with the malignant phenotype of human thyroid neoplasia, and suggested that the detection of the HMG I(Y) proteins might be a valid tool for an easy and sensitive discrimination assay between benign and malignant neoplastic thyroid disease. METHODS: We evaluated the expression of the HMG I(Y) mRNA in 39 frozen thyroid tissues from patients with thyroid nodule by semiquantitative RT-PCR. RESULTS: The expression of the HMG I(Y) mRNA was low in all of 10 normal thyroid tissues. In all of 3 adenomatous goiters, 6 follicular adenomas and 2 Hurthle cell adenomas, the HMG I(Y) mRNA expression level was low. In 11 of 13 papillary carcinomas and all of 5 follicular carcinomas, the HMG I(Y) mRNA expression level was high. CONCLUSION: These results indicate that there is a correlation between the expression of HMG I(Y) and the malignant phenotype of thyroid cancer, suggesting that these proteins may be useful as a marker in thyroid cancer.
Biopsy, Needle ; Comparative Study ; Diagnosis, Differential ; Female ; Gene Expression Regulation, Neoplastic ; High Mobility Group Proteins/analysis+ACo- ; Human ; Male ; Probability ; RNA, Messenger/analysis+ACo- ; Reverse Transcriptase Polymerase Chain Reaction ; Sensitivity and Specificity ; Thyroid Neoplasms/genetics+ACo- ; Thyroid Neoplasms/diagnosis+ACo- ; Thyroid Nodule/genetics+ACo- ; Thyroid Nodule/diagnosis+ACo- ; Tumor Markers, Biological/analysis+ACo-

Increased expression of glucose transporter1 (GLUT1) has been reported in many human cancers. We hypothesized that the degree of GLUT1 might provide a useful biological information in gastric adenocarcinoma. RT-PCR and immunostaining were used to analyze GLUT1 expression in gastric cancer. RT-PCR showed GLUT1 expression was not largely detected in normal gastric tissue but was detected in cancerous gastric tissue of counterpart. By immunohistochemistry, GLUT1 protein was absent in normal gastric epithelium and intestinal metaplasia. 11 of 65 patients with gastric adenocarcinoma had specific GLUT1 immunostaining in a plasma membrane pattern with varied intensities. GLUT1 protein did not show any significant correlation with tumor stage and nodal metastasis (p+AD4-0.05 by Mann-Whitney test). However, the positive immunostaining for GLUT1 is associated with intestinal differentiation (p+AD0-0.003). Our results suggest that GLUT1 protein is associated with intestinal type of gastric cancer.
Adenocarcinoma/pathology ; Adenocarcinoma/chemistry+ACo- ; Adult ; Aged ; Female ; Gastric Mucosa/pathology ; Gastric Mucosa/chemistry+ACo- ; Human ; Intestines ; Male ; Metaplasia ; Middle Age ; Monosaccharide Transport Proteins/analysis+ACo- ; Neoplasm Proteins/analysis+ACo- ; Reverse Transcriptase Polymerase Chain Reaction ; Stomach Neoplasms/pathology ; Stomach Neoplasms/chemistry+ACo- ; Tumor Markers, Biological/analysis+ACo-

Increased expression of glucose transporter1 (GLUT1) has been reported in many human cancers. We hypothesized that the degree of GLUT1 might provide a useful biological information in gastric adenocarcinoma. RT-PCR and immunostaining were used to analyze GLUT1 expression in gastric cancer. RT-PCR showed GLUT1 expression was not largely detected in normal gastric tissue but was detected in cancerous gastric tissue of counterpart. By immunohistochemistry, GLUT1 protein was absent in normal gastric epithelium and intestinal metaplasia. 11 of 65 patients with gastric adenocarcinoma had specific GLUT1 immunostaining in a plasma membrane pattern with varied intensities. GLUT1 protein did not show any significant correlation with tumor stage and nodal metastasis (p+AD4-0.05 by Mann-Whitney test). However, the positive immunostaining for GLUT1 is associated with intestinal differentiation (p+AD0-0.003). Our results suggest that GLUT1 protein is associated with intestinal type of gastric cancer.
Adenocarcinoma/pathology ; Adenocarcinoma/chemistry+ACo- ; Adult ; Aged ; Female ; Gastric Mucosa/pathology ; Gastric Mucosa/chemistry+ACo- ; Human ; Intestines ; Male ; Metaplasia ; Middle Age ; Monosaccharide Transport Proteins/analysis+ACo- ; Neoplasm Proteins/analysis+ACo- ; Reverse Transcriptase Polymerase Chain Reaction ; Stomach Neoplasms/pathology ; Stomach Neoplasms/chemistry+ACo- ; Tumor Markers, Biological/analysis+ACo-

A 42-year-old female diagnosed with tuberous sclerosis was found to have multiple polyps in the fundus of stomach. On histologic examination, the lesions were hamartomatous polyps. In tuberous sclerosis, many lesions occur in multiple organs and there are several reports about the frequent association of hamartomatous polyps of the colon. However, gastric manifestation of tuberous sclerosis has not been established probably due to its asymptomatic nature. This is the first report of multiple gastric hamartomatous polyposis in patient with tuberous sclerosis.
Abdominal Pain/etiology ; Actins/analysis ; Adult ; Case Report ; Cecal Neoplasms/pathology ; Encephalomalacia/etiology ; Female ; Gastric Fundus/pathology ; Gastroscopy ; Hamartoma/genetics+ACo- ; Human ; Hyperplasia ; Nasopharyngeal Neoplasms/pathology ; Neoplasm Proteins/analysis ; Polyps/genetics+ACo- ; Protein Isoforms/analysis ; Stomach Neoplasms/genetics+ACo- ; Tuberous Sclerosis/pathology+ACo- ; Tumor Markers, Biological/analysis

A 42-year-old female diagnosed with tuberous sclerosis was found to have multiple polyps in the fundus of stomach. On histologic examination, the lesions were hamartomatous polyps. In tuberous sclerosis, many lesions occur in multiple organs and there are several reports about the frequent association of hamartomatous polyps of the colon. However, gastric manifestation of tuberous sclerosis has not been established probably due to its asymptomatic nature. This is the first report of multiple gastric hamartomatous polyposis in patient with tuberous sclerosis.
Abdominal Pain/etiology ; Actins/analysis ; Adult ; Case Report ; Cecal Neoplasms/pathology ; Encephalomalacia/etiology ; Female ; Gastric Fundus/pathology ; Gastroscopy ; Hamartoma/genetics+ACo- ; Human ; Hyperplasia ; Nasopharyngeal Neoplasms/pathology ; Neoplasm Proteins/analysis ; Polyps/genetics+ACo- ; Protein Isoforms/analysis ; Stomach Neoplasms/genetics+ACo- ; Tuberous Sclerosis/pathology+ACo- ; Tumor Markers, Biological/analysis

Castleman's disease represents an atypical lymphoproliferative disorder, infrequently associated with various immunologic abnormalities or subsequent development of malignancy such as Kaposi sarcoma, malignant lymphoma and plasmacytoma. Its clinicopathologic features depend on various etiologic factors such as Kaposi sarcoma herpesvirus (KSHV), oversecretion of IL-6, adhesion molecule and follicular dendritic cell dysplasia, etc. To investigate the relationship of Castleman's disease (CD) and the above factors, we reviewed 22 cases of CD. Four cases of KSHV positive CD were detected, all multicentric, plasma cell type, and these cases displayed prominent vascular proliferation, characteristic 'Kaposi-like lesion'. IL-6 and CD54 positive mononuclear cells were scattered in interfollicular areas of KSHV positive cases. Follicular dendritic cell hyperplasia, vascular proliferation, expression of IL-6 and CD54 did not show any significant difference between solitary vs multicentric type, and plasma cell type vs hyaline vascular type. Our study suggests that KSHV positive CD reveals unique pathologic features, and the probable relationship of KSHV and IL-6 and CD54 is discussed.
Adolescence ; Adult ; Biological Markers ; Dendritic Cells, Follicular/pathology ; Epstein-Barr Virus Infections/virology ; Epstein-Barr Virus Infections/epidemiology ; Female ; Germinal Center/pathology ; Giant Lymph Node Hyperplasia/virology ; Giant Lymph Node Hyperplasia/pathology+ACo- ; Giant Lymph Node Hyperplasia/epidemiology ; Giant Lymph Node Hyperplasia/classification ; Herpesviridae Infections/virology ; Herpesviridae Infections/epidemiology ; Herpesvirus 4, Human/isolation +ACY- purification ; Herpesvirus, Kaposi Sarcoma-Associated/isolation +ACY- purification ; Human ; Hyperplasia ; Intercellular Adhesion Molecule-1/analysis ; Interleukin-6/analysis ; Korea/epidemiology ; Lymph Nodes/virology ; Lymph Nodes/pathology ; Lymph Nodes/chemistry ; Male ; Middle Age ; Neovascularization, Pathologic ; Receptors, Complement 3d/analysis ; Retrospective Studies ; Tumor Virus Infections/virology ; Tumor Virus Infections/epidemiology