During tumor progression, a subset of cells acquires metastatic properties, presumably through a series of genetic alterations. As the result, cells detach from the primary tumor, penetrate the basement membrane and invade the adjacent structures including lymph and blood vessels. Loss of adhesive functions and gain of new adhesive functions are thought to play a crucial role in this metastatic cascade. Since tumor metastasis is the principle cause of death for cancer patients including colon cancer, there is a consensus that a search for tools that allow effective assessment of the metastatic potential of tumors is a prime goal for cancer research. An immunohistochemical study of cell adhesion molecules, CD44H and its variant CD44v6, was done to evaluate their relationship with known prognostic factors related to the progression and metastasis of colorectal carcinoma in 94 cases of colorectal carcinoma tissues. The results were as follows. The CD44H expression was detected in 90 (95.7%) and CD44v6 in 53 (56.4%) out of 94 cases of colorectal carcinoma, and the CD44H was overexpressed in tumor tissue more than in normal mucosa in 62% of the cases. The expression rates of both protein were not significantly correlated with age and sex of the patients, invasion depth, lymph node metastasis, tumor differentiation, and tumor site. The coexpression of CD44H and CD44v6 in tumor was significant (p<0.05). The above results suggest that overexpression of CD44H and loss of function to control the alternative splicing of CD44 mRNA resulting in CD44v6 expression and alteration of adhesive function are closely associated with tumorigenesis of the colorectum.
Adhesives ; Alternative Splicing ; Basement Membrane ; Blood Vessels ; Carcinogenesis ; Cause of Death ; Cell Adhesion Molecules* ; Cell Adhesion* ; Colonic Neoplasms ; Colorectal Neoplasms* ; Consensus ; Humans ; Lymph Nodes ; Mucous Membrane ; Neoplasm Metastasis ; Prognosis ; RNA, Messenger

No abstract available.
Cytogenetics*

No abstract available.
Polycythemia*

PURPOSE: This study was conducted to examine the relationships between the recurrence of pneumothorax with demographic and health-related risk factors. METHODS: Demographic factors (age and gender) and health-related risk factors (Body Mass Index, smoking, exercise, stress, fatigue, and morbidity from colds) were measured from 60 patients admitted to two acute care institutions due to pneumothorax. RESULTS: The study results showed significant differences in factors such as height and minutes of performing exercise per week, between the first occurrence and recurrence groups. However, other risk factors did not show significant differences between the two groups. CONCLUSION: Prevention of recurrences is important for the treatment and management of pneumothorax. More studies are required to accumulate empirical evidence for health-related risk factors and pneumothorax recurrence, as the relationship between all factors and recurrence were not obtained by the study results.
Demography ; Fatigue ; Humans ; Pneumothorax ; Recurrence ; Risk Factors ; Smoke ; Smoking

Pleuropulmonary blastoma (PPB) is an unusual intrathoracic blastoma presenting in childhood and characterized by a biphasic neoplastic population of undifferentiated, small round blastemal cells and larger spindle-shaped sarcomatous cells with entrapped benign epithelial-lined structures. We experienced the cytologic features of PPB in imprint smear from the pleural-based huge mass of the middle lobe of the right lung in a 4-year-old boy. The smears showed high cellularity composed of small ovoid blastemal elements and scattered spindle mesenchymal tumor cells. Lobectomy and pathologic investigation confirmed the diagnosis. PPB seems to be a tumor in which accurate diagnosis may be achieved by cytology if appropriate clinical information were given. Timely and accurate diagnosis of PPB by cytology paves the way for attempting preoperative treatment in future cases.
Child, Preschool ; Diagnosis ; Humans ; Lung ; Male

OBJECTIVES: The cost of psychiatric service is increasing every year in Korea. The length of inpatient stay (LOS) is an important factor determining in-patient service cost. This study was aimed to find the factors that influence LOS in a psychiatric open ward of a general hospital. METHODS: The study includes 134 inpatients who were consecutively admitted to a psychiatric open ward in a general hospital from January 1st to June 30th in 2001. Demographic data, clinical characteristics on admission and discharge, global functioning, social support levels and life stressors were collected. RESULTS: The mean LOS for the 134 patients was 15.5 days (S.D 9.2). The occupation of housekeeper and those secred high in phobic anxiety subscale on SCL-90-R were statistically significant predictor for longer LOS in the univariate analysis. No significant differences in LOS were found by diagnostic groups and social support. In multiple regression analysis, the scores of phobic anxiety subscale, occupation and presence of physical illness were statistically significant predictor for LOS. CONCLUSION: This study failed to find the significant variables to account for substantial proportion of variance for LOS.
Anxiety ; Diagnosis ; Hospitals, General* ; Humans ; Inpatients ; Korea ; Length of Stay* ; Occupations