Kyung Chul Moon

BACKGROUND: Caveolin-1 is implicated in the oncogenic transformation of cells as a tumor suppressor. In several human carcinomas, the expression of caveolin-1 has been reported to be correlated with prognosis. The present study was designed to clarify the clinicopathological significance of caveolin-1 expression in pleomorphic carcinoma of the lung (PCL). PATIENTS AND METHODS: Twenty-one cases of PCL were immunohistochemically evaluated for caveolin-1 expression. RESULTS: Caveolin-1 was expresse

Clear cell renal cell carcinoma (CCRCC) is the most common renal cell carcinoma. It has a relatively unfavorable prognosis compared to other common renal cell carcinomas. Recently, comprehensive molecular studies in CCRCC revealed important genetic alterations, including changes in the VHL, PBRM1, and ARID1A genes. The expression of ARID1A protein is associated with tumor progression and prognosis in many cancers. This study aimed to evaluate the nuclear expression of ARID1A in CCRCC and to asse

AIMS: Immunohistochemical (IHC) staining for cytokeratin (CK) 5/6, CD44 and CK20 has been significantly associated with the prognosis of urinary bladder urothelial carcinoma, and probably reflects its molecular characteristics. We aimed to investigate the IHC-based subgroups and their prognostic effects on non-muscle-invasive papillary upper tract urothelial carcinoma (UTUC). METHODS AND RESULTS: IHC staining for CK5/6, CK20 and CD44 was analysed in 211 patients with non-muscle-invasive papillar

Epithelioid angiomyolipoma (EAML) is considered to be a potentially malignant tumor and requires a differential diagnosis from renal cell carcinoma. In this study, we assessed the clinicopathologic features of renal EAML and evaluated the prognostic significance. Among 78 angiomyolipoma (AML) patients, a total of 5 EAMLs were identified, accounting for 6.4% of the total AML cases. The mean age was 41.4 years, and the average tumor size was 12.7 cm in diameter. Association of tuberous sclerosis c

AIM: HER2 overexpression has been reported in a minority of urothelial carcinomas, but little is known about HER2 protein expression and gene alterations in plasmacytoid urothelial carcinoma, a rare and aggressive variant. The aim of this study was to clarify the HER2 status in plasmacytoid urothelial carcinomas. METHODS: Six cases of plasmacytoid urothelial carcinoma were included, in which we evaluated HER2 protein expression by immunohistochemistry (IHC) and HER2 gene amplification by fluores

Smad2, Smad3, and Smad4 are components of the transforming growth factor β signaling pathway associated with tumorigenesis. The expression of these proteins is associated with tumor progression and prognosis of many cancers. This study aimed to evaluate the nuclear expression of Smad2, Smad3, and Smad4 in clear cell renal cell carcinoma and to assess the clinical significance and prognostic value of their expression patterns. The nuclear expression levels of Smads were evaluated in 637 cases of

CONTEXT: E-Cadherin and beta-catenin complexes have been suggested to have critical roles in cancer development and progression. Primary signet ring cell carcinoma (SRCC) of the lung is a rare variant of pulmonary adenocarcinoma, and E-cadherin and beta-catenin expressions of this tumor have not been documented, to our knowledge. OBJECTIVE: To characterize the E-cadherin and beta-catenin expressions in SRCC of the lung. DESIGN: An immunohistochemical evaluation of E-cadherin and beta-catenin exp

Urothelial carcinoma (UC) is the most common histologic type of urinary bladder cancer, and muscle-invasive UC shows aggressive behaviors. Programmed cell death-1 (PD-1)/programmed cell death-ligand 1 (PD-L1) blockades have been approved as standard treatments for patients with advanced stage UC. A total of 166 muscle-invasive urinary bladder cancer (MIBC) patients, who underwent transurethral resection of the bladder or cystectomy from 2004 to 2010 were included. We evaluated PD-L1 expression b

AIMS: In glomerulonephritis, intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) may play important roles in the formation of crescents. These studies are designed to evaluate the expression patterns of ICAM-1 and VCAM-1 in human crescentic glomerulonephritis and to determine the cellular origin of adhesion molecules in the crescentic lesions. METHODS AND RESULTS: We examined the expression of ICAM-1 and VCAM-1 proteins in renal biopsies with cellular (n=7),