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Benchmarks for Cancers for Screening Mammography Examinations from 1996 - 2005 --- based on BCSC data as of 2007*

You are viewing the 2007 collection of this data. Data from other times are also available:
  All Screening Examinations
Cancer detection rate (per 1000) 4.7
Readers with 1000+ examinations 450
Cancers 15,532
All examinations 3,294,680
CDR (Median-50th percentile) 4.5
CDR (25th, 75th percentiles) 3.4, 5.9
CDR (10th, 90th percentiles) 2.6, 7.2
Invasive cancer size  
Readers with 15+ invasive cancers (known size) 229
Cancers 8,646
Mean tumor size in mm (Median - 50th percentile) 17.0
Mean tumor size in mm (25th, 75th percentiles) 15.5, 19.0
Mean tumor size in mm (10th and 90th percentile) 14.0, 22.1
Median tumor size in mm (Median - 50th percentile) 14.0
Median tumor size in mm (25th, 75th percentiles) 12, 15
Median tumor size in mm (10th, 90th percentiles) 11.5, 17
%Minimal cancer 52.6
Readers with 15+ cancers (DCIS/invasive size known) 275
Minimal cancers 6,823
Total cancers (DCIS/invasive size known) 12,972
%Minimal cancer (Median - 50th percentile) 52.9
%Minimal cancer (25th, 75th percentiles) 45.0, 59.4
%Minimal cancer (10th, 90th percentiles) 37.1, 65.1
%Node negative (invasive cancers only) 77.3
Readers with 15+ invasive cancers (known nodal status) 244
Node negative invasive cancers 7,510
Total invasive cancers (known nodal status) 9,713
%Node negative cancer (Median - 50th percentile) 78.0
%Node negative cancer (25th, 75th percentiles) 71.8, 82.6
%Node negative cancer (10th, 90th percentiles) 65.9, 87.8
%Stage 0 or I 74.8
Readers with 15+ cancers (known stage) 269
Stage 0 or I cancers 9,391
Total cancers (known stage) 12,551
%Stage 0 or I cancer (Median - 50th percentile) 75.0
%Stage 0 or I cancer (25th, 75th percentiles) 68.8, 81.0
%Stage 0 or I cancer (10th, 90th percentiles) 64.2, 86.0


Numbers are frequencies unless otherwise indicated.

* Includes examinations for radiologists with minimum numbers of cases in a given column as designated; excludes examinations for which the radiologist is unknown

The number of radiologists in this column does not equal the sum of radiologists in the other column because a given radiologist may contribute to each of the preceding columns, but may contribute to this column only once

Minimal cancer = DCIS or invasive cancer ≤ 10 mm

Table numbers last updated September 19, 2007. The following source must be cited when reproducing this table: NCI-funded Breast Cancer Surveillance Consortium co-operative agreement (U01CA63740, U01CA86076, U01CA86082, U01CA63736, U01CA70013, U01CA69976, U01CA63731, U01CA70040). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/statistics/benchmarks/screening/2007/table6.html .

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