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Benchmarks for Cancers for Screening Mammography Examinations from 2004 - 2008 -- based on BCSC data through 2009*

You are viewing the 2009 collection of this data. Data from other times are also available:
  All Screening Examinations
Cancer detection rate (per 1000) 4.3
Readers with 1000+ examinations 323
Cancers 7,949
All examinations 1,837,422
CDR (Median-50th percentile) 4.3
CDR (25th, 75th percentiles) 2.9, 5.3
CDR (10th, 90th percentiles) 2.1, 6.6
Invasive cancer size  
Readers with 15+ invasive cancers (known size) 145
Cancers 4,257
Mean tumor size in mm (Median - 50th percentile) 17.1
Mean tumor size in mm (25th, 75th percentiles) 15.3, 19.4
Mean tumor size in mm (10th and 90th percentile) 13.8, 23.1
Median tumor size in mm (Median - 50th percentile) 14
Median tumor size in mm (25th, 75th percentiles) 12, 15
Median tumor size in mm (10th, 90th percentiles) 11, 17
%Minimal cancer 52.7
Readers with 15+ cancers (DCIS/invasive size known) 182
Minimal cancers 3,541
Total cancers (DCIS/invasive size known) 6,714
%Minimal cancer (Median - 50th percentile) 52.5
%Minimal cancer (25th, 75th percentiles) 43.2, 60.5
%Minimal cancer (10th, 90th percentiles) 36.4, 64.7
%Node negative (invasive cancers only) 76.4
Readers with 15+ invasive cancers (known nodal status) 149
Node negative invasive cancers 3,527
Total invasive cancers (known nodal status) 4,617
%Node negative cancer (Median - 50th percentile) 76.5
%Node negative cancer (25th, 75th percentiles) 70.6, 82.0
%Node negative cancer (10th, 90th percentiles) 63.3, 87.5
%Stage 0 or I 74.2
Readers with 15+ cancers (known stage) 182
Stage 0 or I cancers 4,894
Total cancers (known stage) 6,595
%Stage 0 or I cancer (Median - 50th percentile) 73.9
%Stage 0 or I cancer (25th, 75th percentiles) 68.4, 78.9
%Stage 0 or I cancer (10th, 90th percentiles) 61.5, 82.8


Numbers are frequencies unless otherwise indicated.

Screening Mammography Examinations: mammography examinations indicated by the radiologist to be for screening, with bilateral routine views done and no other mammogram within the last 9 months, among women without breast implants.

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

Minimal cancer = DCIS or invasive cancer 1-10 mm.

Table numbers last updated Sept 26, 2013 . The following source must be cited when reproducing this table: NCI-funded Breast Cancer Surveillance Consortium (HHSN261201100031C). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/statistics/benchmarks/screening/2009/table6.html .

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