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2015 ; 6
(18
): 16686-97
Nephropedia Template TP
gab.com Text
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English Wikipedia
Difference between observed and expected number of involved lymph nodes reflects
the metastatic potential of breast cancer independent to intrinsic subtype
#MMPMID26071479
Yu KD
; Jiang YZ
; Shao ZM
Oncotarget
2015[Jun]; 6
(18
): 16686-97
PMID26071479
show ga
PURPOSE: Poor prognosis associated with metastasis in breast cancer patients
highlights the critical need to develop an effective evaluation model for
metastatic potential (MP). We hypothesized that MP could be also indicated by
primary tumor size and involved lymph nodes (LNs). METHODS: The expected number
of involved LNs is defined as tumor size (cm) divided by 1.5. The effect of the
surrogate for MP (defined as difference between the number of observed and
expected involved LNs) on breast cancer-specific survival (BCSS) was investigated
in the first cohort from SEER (n = 108,814). Validation was performed in another
SEER cohort (n = 50,414) and a third cohort (n = 3,755). RESULTS: MP is an
independent predictor for BCSS in the overall population [hazard ratio (HR) for
high MP: 2.92; 95% confidence interval (CI): 2.80-3.03] and in subgroups. The
effect of surrogate for MP on survival was independent to intrinsic subtype, with
adjusted HRs of 3.46 (95%CI, 2.02-5.93), 2.30 (95%CI, 1.64-3.24), 4.05 (95%CI,
2.85-5.76), and 1.45 (95%CI, 1.04-2.03) in luminal-A, luminal-B, triple-negative,
and HER2-positive subtypes, respectively. CONCLUSIONS: Difference between the
observed and expected number of involved LNs serves as an indicator for MP, which
is independent to intrinsic subtype and could predict survival. Our findings need
further validation.