Breast cancer is the most common cancer among women in Germany, accounting for around 30 percent of all cancer cases. Since the 1980s, the number of diagnoses has doubled: currently, doctors diagnose breast cancer in approximately 69,000 women each year. In addition, about 6,000 precancerous lesions are detected annually. At present, one in eight women will develop breast cancer during her lifetime.
The rise in incidence is partly due to demographic ageing and partly to the introduction of nationwide screening programmes during this period. As described above, age is one of the most important risk factors for developing breast cancer. Younger women are rarely affected; the risk increases from around the age of 40, particularly after 50, and decreases again after about age 70. The average age at diagnosis is around 64 years, somewhat younger than the average for all cancers. One in four affected women is under 55, and one in ten is younger than 45.
Risk Factors and Early Detection
However, breast cancer is a multifactorial disease. Besides age, several additional risk factors are relevant. These include a family history of breast or ovarian cancer or the presence of a pathogenic variant in one of 18 known high-risk or moderate-risk genes associated with hereditary breast cancer. The most well-known gene loci include BRCA1 and BRCA2. According to recent research, so-called genetic modifiers also play an important role. These represent numerous genetic variants which, in combination, can increase – or decrease – breast cancer risk. Lifestyle factors also play a significant role, including physical inactivity, overweight, unhealthy diet, smoking, alcohol consumption, and a woman’s hormonal profile (age at first menstruation, age at first childbirth, age at menopause, and duration/dosage of hormone replacement therapy or oral contraceptive use).
Although breast cancer is the most common cancer among women, it is not the most fatal. When detected and treated early, most cases are curable. Mortality has been steadily declining for decades. While over 18,000 women die of breast cancer each year, around 87 percent of all women with a breast cancer diagnosis are still alive five years later.
This positive trend is due to improved early detection – allowing tumours to be identified at earlier, more treatable stages – as well as advances in therapy. Surgical, radiotherapeutic, and medical treatments are now more targeted, personalised, and often less burdensome than in the past. Moreover, interdisciplinary care in certified centres is now standard in breast cancer treatment.
To make early detection as effective as possible, screening should be adapted to an individual’s personal risk.
- For women in the general population, the established standard is the national mammography screening programme for women aged 50 to 69, offered every two years.
- Women with a family history or very early cases of cancer, who meet the criteria for hereditary breast and ovarian cancer, are offered genetic counselling and testing (see Figure 1). Depending on the results, they may be enrolled in specialised, intensive surveillance programmes at certified centres for hereditary breast and ovarian cancer (FBREK centres). Current data show a proven survival benefit for women participating in these surveillance programmes.
- For women under 50 who are not yet part of the mammography screening programme and do not qualify for genetic testing, the question arises whether early imaging-based surveillance is advisable. This decision should be based on the individual risk of developing breast cancer.
Recommendations for breast cancer screening: differentiation by risk groups.
In England, recommendations for breast cancer screening already differentiate between risk categories. Women with a lifetime breast cancer risk below 17% or a 10-year risk under 3% should follow the general mammography screening programme. If the lifetime risk is 17–30% (or a 10-year risk of 3–8%), screening should begin earlier and be conducted annually. Women with a lifetime risk over 30% (10-year risk above 8%) are considered high-risk and should be monitored at specialised centres. The NICE guidelines recommend using a well-calibrated risk model such as BOADICEA to calculate these probabilities.
In Germany, individualised approaches have also been incorporated into recommendations, although they are not yet firmly established and are rarely implemented. The defined lifetime risk thresholds are similar to the English recommendations (see Figure 3 in the appendix).
Using individual risk assessment with BOADICEA—currently the only certified risk calculation programme—we offer the calculation of your personal breast cancer risk and the development of a tailored early detection strategy.
Indicators for Genetic Testing
Genetic testing for variants in breast cancer risk genes is indicated when the family constellation suggests an elevated probability (over 10%) of hereditary breast or ovarian cancer. These include families with:
FAMILIES WITH
- at least three women with breast cancer in the same family line, regardless of age at diagnosis
- at least two women with breast cancer in the same line, one diagnosed before age 51
- at least two women with ovarian cancer in the same family line
- at least one woman with breast cancer and one with ovarian cancer (or one woman with both diseases)
- at least one woman diagnosed with breast cancer before age 36
- at least one woman with bilateral breast cancer, with first diagnosis before age 51
- at least one man with breast cancer plus at least one woman with breast or ovarian cancer
- at least one woman with triple-negative breast cancer before age 60*
- at least one woman with ovarian cancer before age 80*
*These criteria were evaluated by the Consortium; testing is possible within special agreements with consortium centres.
*https://www.konsortium-familiaerer-brustkrebs.de/informationen/gentest-einschlusskriterien/
DEUTSCHES KONSORTIUM
Familiärer Brust und Eierstockkrebs

