Interval breast cancers in the 'screening with tomosynthesis or standard mammography' (STORM) population-based trial

Nehmat Houssami, Daniela Bernardi, Francesca Caumo, Silvia Brunelli, Carmine Fantò, Marvi Valentini, Giovanna Romanucci, Maria A Gentilini, Manuel Zorzi, Petra Macaskill

Research output: Contribution to journalArticlepeer-review


BACKGROUND & METHODS: The prospective 'screening with tomosynthesis or standard mammography' (STORM) trial recruited women participating in biennial breast screening in Italy (2011-2012), and compared sequential screen-readings based on 2D-mammography alone or based on tomosynthesis (integrated 2D/3D-mammography). The STORM trial showed that tomosynthesis screen-reading significantly increased breast cancer detection compared to 2D-mammography alone. The present study completes reporting of the trial by examining interval breast cancers ascertained at two year follow-up.

RESULTS: 9 interval breast cancers were identified; the estimated interval cancer rate was 1.23/1000 screens [9/7292] (95%CI 0.56 to 2.34) or 1.24/1000 negative screens [9/7235] (95%CI 0.57 to 2.36). In concurrently screened women who attended the same screening services and received 2D-mammography, interval cancer rate was 1.60/1000 screens [40/25,058] (95% CI 1.14 to 2.17) or 1.61/1000 negative screens [40/24,922] (95% CI 1.15 to 2.18). Estimated screening sensitivity for the STORM trial was 85.5% [59/69] (95%CI 75.0%-92.8%), and that for 2D-mammography screening was 77.3% [136/176] (95%CI 70.4%-83.2%).

CONCLUSION: Interval breast cancer rate amongst screening participants in the STORM trial was marginally lower (and screening sensitivity higher) than estimates amongst 2D-screened women; these findings should be interpreted with caution given the small number of interval cases and the sample size of the trial. Much larger screening studies, or pooled analyses, are required to examine interval cancer rates arising after breast tomosynthesis screening versus digital mammography screening.

Original languageEnglish
Pages (from-to)150-153
Number of pages4
Publication statusPublished - Apr 2018


  • Aged
  • Breast Neoplasms/diagnostic imaging
  • Early Detection of Cancer/methods
  • Female
  • Humans
  • Imaging, Three-Dimensional/methods
  • Italy/epidemiology
  • Mammography/methods
  • Mass Screening/methods
  • Middle Aged
  • Prospective Studies
  • Sensitivity and Specificity
  • Time Factors


Dive into the research topics of 'Interval breast cancers in the 'screening with tomosynthesis or standard mammography' (STORM) population-based trial'. Together they form a unique fingerprint.

Cite this