Publications by authors named "Jong-Sang Choi"

Background: Direction changes while walking are more likely to cause a hip fracture than is falling while walking in a straight line. Trunk stability is an important contributor to safe and effective walking, and arm movements influence trunk movement while walking. However, the difference in the trunk stability during semicircular turns performed by elderly women with a light bag has not been examined.

View Article and Find Full Text PDF

Background: The over expression of fascin, extracellular matrix metalloproteinase inducer (EMMPRIN), and ezrin proteins has been associated with poor prognosis in various carcinomas and sarcomas. However, very few studies have reported the relationship between the expression of fascin, EMMPRIN, and ezrin proteins and the clinico-pathologic parameters of colorectal carcinomas.

Aims: The aim was to investigate the relationship between fascin, EMMPRIN, and ezrin proteins in colorectal adenocarcinomas and their correlation with clinico-pathologic parameters.

View Article and Find Full Text PDF

Aim: To investigate the prognostic significance of S100A4 expression in colorectal cancer and its correlation with expression of E-cadherin and p53.

Methods: A cohort of archival formalin-fixed paraffin-embedded specimens was selected from 127 patients with colorectal cancer who underwent surgical resection between April 2000 and March 2004 at the Department of Surgery, Korea University Guro Hospital. The expression of protein S100A4 was evaluated according to the proportion of positively stained cancer cells.

View Article and Find Full Text PDF

Systematic and effective welfare for the disabled is possible when there are scientific and objective criteria demonstrating either presence or severity of the impairment. We need our own scientific criteria suitable for our culture and society, since the impairment is influenced by them. In 2007, we established the Developing Committee of Korean Academy of Medical Sciences (KAMS) Guideline for Impairment Rating under KAMS supervision.

View Article and Find Full Text PDF

Background/aims: This investigation aimed to elucidate the expression patterns of S100A4 and adhesion molecules in gastric carcinoma and to estimate their correlation with clinicopathologic parameters.

Methodology: The expression of S100A4, E-cadherin, alpha- and beta-catenin was studied in 251 gastric carcinoma specimens through immunohistochemical staining.

Results: The positive expression of S100A4 was significantly associated with advanced gastric cancer, higher pTNM stage, and poorer survival rates, especially when present in nuclear staining.

View Article and Find Full Text PDF

Extraskeletal Ewing's sarcoma (EES) is a branch of neuroectodermal tumor (PNET), which is very rare soft tissue sarcoma. We report a case of EES/PNET arising is the lung of a 67-yr-old man. Computed tomography, bone scintigraphy, and positron emission tomography confirmed the mass to have a primary pulmonary origin.

View Article and Find Full Text PDF

Purpose: The significance of liver intestine-cadherin as a potential marker has been growing in the field of oncology, because of its unique features compared with classic cadherins. We investigated the coexpression patterns of E-cadherin and liver intestine-cadherin in colorectal cancer, and determined whether differences in expression patterns were associated with clinicopathologic parameters and also which relationship between these two adhesion molecules existed in colorectal cancer.

Methods: Expression pattern of E-cadherin and liver intestine-cadherin was investigated immunohistochemically in 207 colorectal cancers along with clinicopathologic parameters.

View Article and Find Full Text PDF

Multiple gastrointestinal stromal tumors (GISTs) are extremely rare and usually associated with type 1 neurofibromatosis and familial GIST. The aim of this study was to investigate the clinical, phenotypic, and genetic characteristics of multiple GISTs to gain insights into their underlying pathogenesis and clinical behavior. Forty-seven paraffin blocks of multiple GISTs from 12 patients were analyzed.

View Article and Find Full Text PDF

Gastrointestinal stromal tumor is characterized by a gain of function mutation of KIT gene and the expression of c-kit protein, but in 5% of cases, c-kit expression is negative although histological findings of gastrointestinal stromal tumor are most suspicious. The existence of c-kit-negative gastrointestinal stromal tumors points to the need of additional markers for making the diagnosis. In this study, we studied the expression of PKCtheta and correlated their expression with other immunohistochemical profiles of gastrointestinal stromal tumors and evaluated their usability as a diagnostic marker.

View Article and Find Full Text PDF

Seven hundred forty seven cases of gastrointestinal stromal tumors (GISTs) in Koreans who were diagnosed between 2001 and 2002 were analyzed to evaluate their occurrence and their clinical, pathologic and immunohistochemical findings. The most frequent location of tumor was in the stomach (63%), followed by the small intestine (30%), the colorectum (5%), and the esophagus (2%). c-kit expression was found in 93.

View Article and Find Full Text PDF

Purpose: The purpose of this study was to evaluate the expressions of KAI-1 and survivin, and to investigate their correlation with the clinical stage and survival rate of patients with ovarian carcinomas.

Materials And Methods: The expressions of survivin and KAI-1 were immunohistochemically determined in 54 serous and mucinous ovarian adenocarcinomas and borderline malignancy tumors. 10 of the 54 cases were also analyzed for the expressions of survivin and KAI-1 using western blot.

View Article and Find Full Text PDF

We randomly selected 50 cervical smears (benign, 14; atypical squamous cells of undetermined significance [ASCUS], 5; low-grade squamous intraepithelial lesion [LSIL], 10; high-grade squamous intraepithelial lesion (HSIL), 12; squamous cell carcinoma, 6; adenocarcinoma, 3) and captured 1,181 digital images (518 MB) at a maximum resolution of 1,600 x 1,200 pixels and transmitted them by e-mail. Diagnosis of glass slides and digital images was done independently in a double-blind manner by 3 pathologists and 3 cytotechnologists, commencing with the diagnosis of digital images followed by diagnosis of glass slides 3 months later. The procedure was repeated after 3 months.

View Article and Find Full Text PDF

Most of human dirofilariasis are pulmonary or subcutaneous infections, but there have been a few reports of human dirofilariasis in unusual sites, such as large vessels, mesentery, peritoneal cavity, and spermatic cord. We present the first case of human hepatic dirofilariasis, which was surgically diagnosed. A 39-year-old man without any evidence of systemic symptom was found incidentally to have a hepatic nodule during routine physical check-up.

View Article and Find Full Text PDF

Digital camera technology has developed rapidly and a large choice of reasonably priced, user-oriented models are now available. These can be used for both macroscopic and microscopic photography with good resolution. Internet transmission of digital images also makes it possible to consult pathologists anywhere in the world.

View Article and Find Full Text PDF

Purpose: Axillary lymph node metastases are the single most important predictor of overall survival in patients with breast cancer. Micrometastases are defined by the American Joint Committee on Cancer as tumor foci less than or equal to 2 mm in greatest dimension. Recently, up to 30% of breast cancer patients were reported to have micrometastases.

View Article and Find Full Text PDF