Journal of Pathology and Translational Medicine

Original Articles

Early Colorectal Epithelial Neoplasm in Korea: A Multicenter Survey of Pathologic Diagnosis: Yun Kyung Kang, So-Young Jin, Mee Soo Chang, Jung Yeon Kim, Gyeong Hoon Kang, Hye Seung Lee, Jin Hee Sohn, Ho Sung Park, Kye Won Kwon, Mi Jin Gu, Young Hee Maeng, Jong Eun Joo, Haeng Ji Kang, Hee Kyung Kim, Kee-Taek Jang, Mi Ja Lee, Hee Kyung Chang, Joon Mee Kim, Hye Seung Han, Won Ae Lee, Yoon Jung Choi, Dong Wook Kang, Sunhoo Park, Jae Hyuk Lee, Mee-Yon Cho; Korean J Pathol. 2013;47(3):245-251. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.245

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Background

The incidence of early colorectal epithelial neoplasm (ECEN) is increasing, and its pathologic diagnosis is important for patient care. We investigated the incidence of ECEN and the current status of its pathologic diagnosis.

Methods

We collected datasheets from 25 institutes in Korea for the incidence of colorectal adenoma with high grade dysplasia (HGD) and low grade dysplasia in years 2005, 2007, and 2009; and early colorectal carcinoma in the year 2009. We also surveyed the diagnostic terminology of ECEN currently used by the participating pathologists.

Results

The average percentage of diagnoses of adenoma HGD was 7.0%, 5.0%, and 3.4% in years 2005, 2007, and 2009, respectively. The range of incidence rates of adenoma HGD across the participating institutes has gradually narrowed over the years 2005 to 2009. The incidence rate of early colorectal carcinoma in the year 2009 was 21.2%. The participants did not share a single criterion or terminology for the diagnosis of adenoma HGD. The majority accepted the diagnostic terms that distinguished noninvasive, mucosal confined, and submucosal invasive carcinoma.

Conclusions

Further research requirements suggested are a diagnostic consensus for the histopathologic diagnosis of ECEN; and standardization of diagnostic terminology critical for determining the disease code.

Citations

Citations to this article as recorded by

Diminutive and Small Colorectal Polyps: The Pathologist's Perspective
Yun Kyung Kang
Clinical Endoscopy.2014; 47(5): 404. CrossRef

Image Analysis of Glomerular Changes in Patients with Post-transplant IgA Nephropathy.: Kye Won Kwon, Hyeon Joo Jeong; Korean J Pathol. 2001;35(3):206-211.

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Abstract PDF: BACKGROUND
IgA nephropathy after renal transplantation (post-transplant IgAN) may recapitulate the IgAN of native kidneys, however, little has been reported about the histologic characteristics. The aim of this study is to apply glomerular morphometry using an image analyser to examine the histologic characteristics of post-transplant IgAN.
METHODS
The outer margin of the glomerulus (Bowman's area, BA) and glomerular tuft area (GA) were traced manually. The measured area were automatically calculated by KS300 image analysis system (Kontron, Munchen, Germany). The mesangial area (MA) was calculated with a summing each manually traced mesangial area. The total number of glomerular (GC) and mesangial cells (MC) were counted. Eight cases of renal section obtained by nephrectomy due to renal cell carcinoma (normal control: N-CTRL) and nineteen cases of renal section obtained from post-transplantation patients without IgAN (transplantation control: Tx-CTRL) served as controls.
RESULTS
A total of 35 biopsies were finally selected for measurement. BA and GA of post-transplant IgAN were 1.6 and 1.4 times larger than the N-CTRL, respectively, and were not significantly different from Tx-CTRL. MA was 1.4 times significantly larger than that of the Tx-CTRL. As compared to that of the N-CTRL, it was 1.2 times larger, but this difference was not statistically significant. The GC and MC of post-transplant IgAN and the Tx-CTRL were significantly lower than the N-CTRL. There were no significant correlations between glomerular hypertrophy and duration after renal transplantation, mesangial changes, segmental sclerosis, or degree of renal cortical interstitial fibrosis in post-transplant IgAN.
CONCLUSIONS
Prominent glomerular hypertrophy and mesangial expansion suggest a hyperfiltration injury in post-transplant IgAN and a possible way to glomerulosclerosis.

Case Report

Minimal Deviation Endometrioid Adenocarcinoma of the Uterine Cervix: A Case Report.: Kye Won Kwon, Susie Chin, Hee Kyung Kim, Eun Seok Koh, Kyu Rae Kim, Kye Hyun Nam; Korean J Pathol. 2008;42(4):240-243.

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Abstract PDF: We describe here a case of minimal deviation endometrioid adenocarcinoma (MDEA) of the uterine cervix that was initially suspected according to the abnormal cytologic findings in a 39-year-old woman. The Papanicolaou (pap) smear showed many neoplastic glandular cells in monolayered sheets, rosettes, and clusters with palisading and feathering borders. The tumor cells had oval, hyperchromatic nuclei, with chromatin clumping and small nucleoli. Histologic examination disclosed endometrial-type glands with a bland, isolated, mainly rounded appearance and these glands were widely scattered deep into the cervical stroma with only scant stromal reaction. An association of MDEA with tubo-endometrioid metaplasia or cervical endometriosis has been suggested by identifying the tubo-endometrioid glands in the vicinity of the MDEA.

Original Article

Nitric Oxide Synthase Expression in Early Stage of Aging Rat Kidney.: Kye Won Kwon, Hyeon Joo Jeong; Korean J Pathol. 2004;38(2):86-92.

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Abstract PDF: BACKGROUND
Nitric oxide synthase (NOS) has been suggested to have a role in renal injury of aging rats.
METHODS
Renal function and histology were compared between 12 month-and 7-9 week-old rats. Proliferating activity and cell death were evaluated by PCNA index and apoptosis. Three isoforms of NOS (eNOS, iNOS, and nNOS) were stained by immunohistochemistry.
RESULTS
Serum creatinine level was increased in old rats (1.0 mg/dL vs 0.5 mg/dL, p=0.000). 24 h proteinuria and urinary NO were comparable between the two groups. The percentage of global and segmental glomerulosclerosis increased in old rats. PCNA index decreased in the glomeruli (0.1 vs 0.6/glomerulus, p=0.005) and the tubulointerstitium (10.2 vs 19.2/mm2, p=0.019) of old rats compared to that of young rats. However, no difference was observed in the number of TUNEL positive cells. eNOS was not stained in young and old rat kidney, whereas iNOS was stained in the interstitial inflammatory cells of old rats (0.3 vs 0.0 of young rats/mm2, p=0.188). Macula densa nNOS staining significantly decreased in old rats compared to young rats (5.6 vs 9.5/mm2, p=0.009).
CONCLUSIONS
Proliferating activity is more affected than cell death with aging. Decreased nNOS expression without alteration of eNOS and iNOS expressions may implicate nNOS as a marker of renal injury in the early stage of aging.

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