Influence of mammographic screening on trends in breast-conserving surgery in Ireland

Trends in surgical treatment for breast cancer in Germany after the implementation of the mammography screening program

In Germany, the nationwide population-based mammography screening program (MSP) was introduced in 2005 and is full-running since 2010. By 2014, incidence rates for invasive breast cancer were very similar to those of the pre-screening era. Therefore, the ongoing effect of the MSP on breast cancer surgery rates can now be investigated. We analyzed population-based breast-conserving (BCS) and mastectomy (MET) surgery rates (per 100,000) among women aged < 50, 50-69 (eligible for the MSP), and 70+ years among women with in situ and invasive breast cancer during 2005-2015. For invasive breast cancer, both BCS and MET rates slightly increased in the age group < 50 years (38.3 in 2005 vs 42.5 in 2015 and 15.7 vs 18.2, respectively). In contrast, MET rates considerably decreased among women aged 50-69 and 70+ years (92 vs 65.4 and 155.4 vs 122.1, respectively), while BCS rates increased in both age groups (210.6 vs 254.4 and 147.2 vs 187, respectively). For in situ breast cancer, MET rates slightly increased in all age groups. BCS rates slightly increased in women aged < 50, but nearly doubled for women aged 50-69 (26.9 vs 49.1) and markedly increased in the 70+ age group (11.5 vs 16.1). During and after the implementation of MSP, there was a strong shift towards BCS within the screening-eligible age group and for women aged 70+ . Women with invasive breast cancer in these age groups may profit from screening with a decline of MET rates in favor of BCS rates at the expense of higher surgery rates for in situ breast cancer.

Nationwide population-based study of trends and regional variation in breast-conserving treatment for breast cancer

Background

Landmark trials have shown breast-conserving surgery (BCS) combined with radiotherapy to be as safe as mastectomy in breast cancer treatment. This population-based study aimed to evaluate trends in BCS from 1989 to 2015 in nine geographical regions in the Netherlands.

Methods

All women diagnosed between 1989 and 2015 with primary T1–2 N0–1 breast cancer, treated with BCS or mastectomy, were identified from the Netherlands Cancer Registry. Crude and case mix-adjusted rates of BCS were evaluated and compared between nine Dutch regions for two time intervals: 1989–2002 and 2003–2015. The annual percentage change in BCS per region over time was assessed by means of Joinpoint regression analyses. Explanatory variables associated with the choice of initial surgery were evaluated using multivariable logistic regression.

Results

A total of 202 934 patients were included, 82 200 treated in 1989–2002 and 120 734 in 2003–2015. During 1989–2002, the mean rate of BCS was 50·6 per cent, varying significantly from 39·0 to 71·7 per cent between the nine regions. For most regions, a marked rise in BCS was observed between 2002 and 2003. During 2003–2015, the mean rate of BCS increased to 67·4 per cent, but still varied significantly between regions from 58·5 to 75·5 per cent. A significant variation remained after case-mix correction.

Conclusion

This large nationwide study showed that the use of BCS increased from 1989 to 2015 in the Netherlands. After adjustment for explanatory variables, a large variation still existed between the nine regions. This regional variation underlines the need for implementation of a uniform treatment and decision-making strategy.

Influence of breast cancer opportunistic screening on aesthetic surgical outcome: A single-center retrospective study in Switzerland

The aim of this retrospective study is to compare the surgical aesthetic outcome and breast cancer (BC) characteristics in patients with BC detected either by opportunistic screening or clinical diagnosis. 262 women undergoing surgery for BC between 2009 and 2012 were included. The following features were compared in the two groups of patients: (1) age at diagnosis; (2) family history of BC; (3) histology type; (4) tumor diameter; (5) local staging, and (6) type of surgical treatment. In 92/262 (35.1%) cases BC was detected by screening and 170/262 (64.9%) had clinical diagnosis. A positive family history and ductal carcinoma in situ diagnosis were more frequent in patients with clinical diagnosis (P = .001 and P < .0001 respectively). Mean maximum diameter of invasive cancers was significantly greater in symptomatic patients (P < .001). Breast conserving surgery was performed in 76/92 (82.6%) patients with screening and 115/170 (67.6%) with clinical diagnosis. Mastectomy was performed in 16/92 (17.4%) patients with screening and 55/170 (32.3%) with clinical diagnosis. Mastectomy was more frequent in patients with clinical diagnosis of BC (P = .010). No significant group differences were found regarding the other features. This study demonstrated that in opportunistic screening, breast conserving surgery may be applied in a higher number of cases compared to patients presenting with clinical diagnosis, thereby improving life quality of these patients.

Mode of prostate cancer detection is associated with the psychological wellbeing of survivors: results from the PiCTure study

PURPOSE

Many men with prostate cancer are asymptomatic, diagnosed following prostate specific antigen (PSA) testing. We investigate whether mode of detection, i.e. 'PSA detected' or 'clinically detected', was associated with psychological wellbeing among prostate cancer survivors.

METHODS

A cross-sectional postal questionnaire was administered in 2012 to 6559 prostate cancer (ICD10 C61) survivors up to 18 years post-diagnosis, identified through population-based cancer registries in Ireland. Psychological wellbeing was assessed using the Depression Anxiety Stress Scale-21. Logistic regression was used to investigate associations between mode of detection and depression, anxiety and stress, adjusting for socio-demographic and clinical confounders.

RESULTS

The response rate was 54 % (3348/6262). Fifty-nine percent of survivors were diagnosed with asymptomatic PSA-tested disease. Prevalence of depression (13.8 vs 20.7 %; p < 0.001), anxiety (13.6 vs 20.9 %; p < 0.001) and stress (8.7 vs 13.8 %; p < 0.001) were significantly lower among survivors diagnosed with PSA-detected, than clinically detected disease. After adjusting for clinical and socio-demographic factors, survivors with clinically detected disease had significantly higher risk of depression (odds ratio (OR) = 1.46 95 % CI 1.18, 1.80; p = 0.001), anxiety (OR = 1.36 95 % CI 1.09, 1.68; p = 0.006) and stress (OR = 1.43 95 % CI 1.11, 1.85; p = 0.006) than survivors with PSA-detected disease.

CONCLUSIONS

These findings contribute to the ongoing debate on benefits and risks of PSA testing and may be considered by policy makers formulating population-based prostate cancer screening policies. The relatively high prevalence of negative psychological states among survivors means that a 'risk-adapted approach' should be implemented to screen survivors most at risk of psychological morbidity for psychological health, and mode of detection could be considered as a risk stratum.

European Code against Cancer, 4th Edition: Cancer screening

In order to update the previous version of the European Code against Cancer and formulate evidence-based recommendations, a systematic search of the literature was performed according to the methodology agreed by the Code Working Groups. Based on the review, the 4th edition of the European Code against Cancer recommends: "Take part in organized cancer screening programmes for: Bowel cancer (men and women); Breast cancer (women); Cervical cancer (women)." Organized screening programs are preferable because they provide better conditions to ensure that the Guidelines for Quality Assurance in Screening are followed in order to achieve the greatest benefit with the least harm. Screening is recommended only for those cancers where a demonstrated life-saving effect substantially outweighs the potential harm of examining very large numbers of people who may otherwise never have, or suffer from, these cancers, and when an adequate quality of the screening is achieved. EU citizens are recommended to participate in cancer screening each time an invitation from the national or regional screening program is received and after having read the information materials provided and carefully considered the potential benefits and harms of screening. Screening programs in the European Union vary with respect to the age groups invited and to the interval between invitations, depending on each country's cancer burden, local resources, and the type of screening test used For colorectal cancer, most programs in the EU invite men and women starting at the age of 50-60 years, and from then on every 2 years if the screening test is the guaiac-based fecal occult blood test or fecal immunochemical test, or every 10 years or more if the screening test is flexible sigmoidoscopy or total colonoscopy. Most programs continue sending invitations to screening up to the age of 70-75 years. For breast cancer, most programs in the EU invite women starting at the age of 50 years, and not before the age of 40 years, and from then on every 2 years until the age of 70-75 years. For cervical cancer, if cytology (Pap) testing is used for screening, most programs in the EU invite women starting at the age of 25-30 years and from then on every 3 or 5 years. If human papillomavirus testing is used for screening, most women are invited starting at the age of 35 years (usually not before age 30 years) and from then on every 5 years or more. Irrespective of the test used, women continue participating in screening until the age of 60 or 65 years, and continue beyond this age unless the most recent test results are normal.

Effect of mammography screening on surgical treatment for breast cancer in Norway: comparative analysis of cancer registry data

OBJECTIVE

To determine the effect of mammography screening on surgical treatment for breast cancer.

DESIGN

Comparative analysis of data from Norwegian cancer registry.

SETTING

Mammography screening, Norway (screening of women aged 50-69 was introduced sequentially from 1996 to 2004).

PARTICIPANTS

35,408 women aged 40-79 with invasive breast cancer or ductal carcinoma in situ treated surgically from 1993 to 2008.

MAIN OUTCOME MEASURES

Rates of breast surgery (mastectomy plus breast conserving treatment) and rates of mastectomy for three age groups of women: 40-49, 50-69, and 70-79. Changes in rates from pre-screening period (1993-5) to introduction of screening phase (1996-2004) and then to screening period (2005-8) are presented as hazard ratios in invited and non-invited women.

RESULTS

The annual rate for breast surgery from the pre-screening period (1993-5) to screening period (2005-8) in Norway increased by 70% (hazard ratio 1.70, 95% confidence interval 1.62 to 1.78), from 180 to 305 per 100,000 women in the invited age group (50-69 years). In the younger, non-invited age group (40-49 years), however, the increase was only 8% (1.08, 1.00 to 1.16), from 133 to 144 per 100,000 women per year, whereas in the older, non-invited age group (70-79 years) the rate decreased by 8% (0.92, 0.86 to 1.00), from 227 to 214 per 100,000 women per year. The rates for mastectomy decreased similarly from the pre-screening period to screening period in invited and non-invited women. From the pre-screening period to the introduction phase of screening (1996-2004), however, the annual mastectomy rate in women aged 50-69 invited to screening increased by 9% (1.09, 1.03 to 1.14), from 156 to 167 per 100,000 women, and in the younger non-invited women declined by 17% (0.83, 0.78 to 0.90), from 109 to 91 per 100,000 women. In consequence, the mastectomy rate was 31% (1.31, 1.20 to 1.43) higher in the invited than in the non-invited younger age group.

CONCLUSIONS

Mammography screening in Norway was associated with a noticeable increase in rates for breast cancer surgery in women aged 50-69 (the age group invited to screening) and also an increase in mastectomy rates. Although over-diagnosis is likely to have caused the initial increase in mastectomy rates and the overall increase in surgery rates in the age group screened, the more recent decline in mastectomy rates has affected all age groups and is likely to have resulted from changes in surgical policy.

A retrospective study of the effect of participation in screening mammography on the use of chemotherapy and breast conserving surgery

A population sample was obtained from the British Columbia (BC) Cancer Registry of all women diagnosed with a first breast cancer in 2002 who were resident in Greater Vancouver or Greater Victoria, BC. Information on treatment and prognostic factors were obtained from source records. The study group was linked to the records of the Screening Mammography Program of BC to identify screening histories on women prior to diagnosis. Logistic regression was used to determine the relationship between screening participation and treatment and to predict treatment use from prognostic factors. Fifteen hundred and eighty-nine women with breast cancer were included in the study and 1,071 (67%) had participated in screening prior to diagnosis: 786 (49%) had been screened within the 30 months prior to their diagnosis (regular participants). Breast conserving surgery (BCS) rates were higher (OR = 2.3, p < 0.001) and chemotherapy use lower (OR = 0.53, p < 0.001) among regular participants compared with nonparticipants after adjustment for age. A predictive model based on the distribution of prognostic factors between participants provided estimates of OR = 1.47 and OR = 0.54 for BCS and chemotherapy, respectively, and adjustment for self-selection changed the predicted values to OR = 1.16 and OR = 0.67, respectively. Participation in screening produced a considerable change in the use of chemotherapy but less on BCS use.