Increasing trends in in situ breast cancer incidence in a region with no population-based mammographic screening program: results from Zurich, Switzerland 2003-2014.

Karavasiloglou, Nena; Matthes, Katarina L; Berlin, Claudia; Limam, Manuela; Wanner, Miriam; Korol, Dimitri; Rohrmann, Sabine (2019). Increasing trends in in situ breast cancer incidence in a region with no population-based mammographic screening program: results from Zurich, Switzerland 2003-2014. Journal of cancer research and clinical oncology, 145(3), pp. 653-660. Springer 10.1007/s00432-018-2822-2

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PURPOSE Increase in in situ breast cancer (BCIS) incidence has been reported across Europe and the USA. However, little is known about the trends in BCIS incidence in regions without population-based mammographic screening programs. We set out to investigate these trends in Zurich, Switzerland, where only opportunistic mammographic screening exists. METHODS Data from 989 women diagnosed with a primary BCIS between 2003 and 2014 were used in our analyses. Age-standardized incidence rates per 100,000 person-years (ASR) were computed per year. Additional analyses by BCIS subtype, by age group at diagnosis and by incidence period were conducted. Incidence trends over time were assessed using joinpoint regression analysis. RESULTS The overall BCIS ASR was 10.7 cases per 100,000 person-years with an increasing trend over the study period. A similar trend was observed for the ductal carcinoma in situ (DCIS) ASR, while the lobular carcinoma in situ (LCIS) ASR decreased. Age-specific analyses revealed that the 50-59 year age group had the highest BCIS ASR. The highest increase in BCIS ASR, even though not statistically significant, was observed for the < 40 year age group. CONCLUSIONS BCIS ASR increased linearly over a 12-year period. The increase was reflected by an increase in DCIS ASR, whereas LCIS ASR decreased over time. The highest increase in BCIS ASR over the study period was observed for the < 40 year age group, even though not statistically significant. Patient and tumor characteristics of this group that may be associated with BCIS development warrant further investigation.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine

UniBE Contributor:

Berlin, Claudia

Subjects:

600 Technology > 610 Medicine & health
300 Social sciences, sociology & anthropology > 360 Social problems & social services

ISSN:

1432-1335

Publisher:

Springer

Language:

English

Submitter:

Tanya Karrer

Date Deposited:

17 Jan 2019 19:11

Last Modified:

21 Feb 2019 01:32

Publisher DOI:

10.1007/s00432-018-2822-2

PubMed ID:

30547321

Uncontrolled Keywords:

Ductal carcinoma in situ In situ breast cancer Incidence Lobular carcinoma in situ Opportunistic screening Trend

BORIS DOI:

10.7892/boris.123501

URI:

https://boris.unibe.ch/id/eprint/123501

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