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The Korean Journal of Pathology 2010;44(4): 390-396.
doi: https://doi.org/10.4132/KoreanJPathol.2010.44.4.390
Clinicopathological Significance of Invasive Ductal Carcinoma with High Prevalence of CD44(+)/CD24(-/low) Tumor Cells in Breast Cancer.
Ji Youn Sung, Gou Young Kim, Yong Koo Park, Juhie Lee, Youn Wha Kim, Sung Jig Lim
1Department of Pathology, Kyung Hee University Medical Center, Seoul, Korea.
2Department of Pathology, East-West Neo Medical Center, Kyung Hee University College of Medicine, Seoul, Korea. sungjig@khu.ac.kr
BACKGROUND: Epithelial tumor cells with a CD44(+)/CD24(-/low) immunoprofile may have the ability to cause breast cancer. We studied these cells and their clinicopathological significance. METHODS: The clinicopathologic findings of 100 invasive ductal carcinoma (IDC) cases and 45 ductal carcinoma in situ (DCIS) cases were reviewed. CD44(+)/CD24(-/low) tumor cells were identified by immunohistochemistry, and their clinicopathological implications in IDC and DCIS were analyzed. RESULTS: IDC with a high prevalence of CD44(+)/CD24(-/low) tumor cells was significantly associated with larger mass, higher grade, estrogen receptor (ER) negativity, and tumor cells with a higher frequency of metastasis. The proportion of CD44(+)/CD24(-/low) tumor cells in IDC, and its DCIS components was not significantly different, whereas the proportion of CD44(+)/CD24(-/low) tumor cells was higher in DCIS than in the DCIS component of IDC (p < 0.001). CONCLUSIONS: IDC with a high prevalence of CD44(+)/CD24(-/low) tumor cells might correlate with aggressive features, such as ER and higher grades. Moreover, the proportion of CD44(+)/CD24(-/low) tumor cells in the DCIS components of IDC and DCIS might harbor different biology, which may lead to differences in cancer progression and early carcinogenesis.
Key Words: Neoplastic stem cells; CD44 protein, human; CD24 protein, human; Invasive ductal carcinoma; Carcinoma, intraductal, noninfiltrating