FRABOC was the Familial Risk Assessment – Breast and Ovarian Cancer tool, an Australian online resource once used by general practitioners and nurses to estimate a woman’s familial risk of breast and ovarian cancer. It sorted family-history patterns into broad groups such as average, moderately increased, or potentially high risk. FRABOC is no longer available through Cancer Australia, so it should not be treated as a current self-assessment tool. Today, Australian readers are more likely to be directed to iPrevent for personalised breast cancer risk assessment and to a GP or family cancer clinic when the family pattern suggests inherited risk.
I think the simplest way to understand FRABOC is this: it was a clinical sorting tool, not a cancer diagnosis, a genetic test, or a guarantee about what would happen to one person.
Is FRABOC Still Available?
No. Cancer Australia describes FRA-BOC as a former online tool designed for health professionals and confirms that it is no longer available. More current breast cancer risk-assessment tools are now used.
Old FRABOC charts still appear in archived documents and online discussions. They can explain how Australian clinicians previously grouped family-history risk, but they should not be used alone to decide whether someone needs mammography, MRI, genetic testing, medication, or preventive surgery.
I would treat an old FRABOC result as historical context. A current assessment may consider age, medical and reproductive history, lifestyle factors, breast density where known, previous biopsy findings, genetic information, and a fuller cancer history across the family.
How Did FRABOC Work?
FRABOC focused mainly on the pattern of breast and ovarian cancer among blood relatives. It considered which relatives had cancer, how closely they were related, their age at diagnosis, whether cancers appeared on the same side of the family, and whether unusual features suggested an inherited cancer syndrome.
The tool helped a health professional consider two different questions:
- Does this family history suggest a higher chance of developing breast or ovarian cancer?
- Does the pattern raise the possibility of an inherited cancer-predisposition gene variant?
Those questions overlap, but they are not identical. A person can have increased breast cancer risk without carrying a high-risk gene variant.
A family can also appear unremarkable because it is small, records are incomplete, relatives are estranged, or family members died before reaching the ages when breast cancer becomes more common. This is why the quality of the family information matters almost as much as the number of reported cases.
The Three Historical FRABOC Risk Categories
Cancer Australia’s older familial-risk guidance grouped women without breast or ovarian cancer into three broad categories. The table below explains that historical framework; it is not a current personal risk calculation.
| Historical FRABOC category | General meaning | Typical family-history pattern |
|---|---|---|
| At or slightly above average risk | No more than about 1.5 times population risk | No confirmed history, one first-degree relative diagnosed at 50 or older, or limited later-age cases |
| Moderately increased risk | Roughly 1.5 to 3 times population risk | A first-degree relative diagnosed before 50, or two close relatives on the same side without stronger high-risk features |
| Potentially high risk | More than 3 times population risk in some families | Multiple breast or ovarian cancers on one side, very young diagnosis, bilateral disease, male breast cancer, or a known high-risk gene variant |
The historical categories and their approximate risk ranges came from older Cancer Australia familial breast and ovarian cancer guidance.
This framework prevented a common mistake: assuming that any family history automatically means very high risk. Most women assessed under the old system did not fall into the potentially high-risk group.
Broad categories still hide important differences. “One affected aunt” could mean an aunt diagnosed at 76 or one diagnosed at 34 with triple-negative breast cancer. Those histories should not be treated as equivalent.
The label alone is not enough. Age at diagnosis, tumour characteristics, additional cancers, ancestry, genetic results, and the wider family pattern can materially change the assessment.
Which Relatives Count in a FRABOC-Style Assessment?
A useful cancer family history includes first-degree and second-degree blood relatives on both sides of the family.
First-degree relatives include:
- Parents
- Brothers and sisters
- Children
Second-degree relatives include:
- Grandparents
- Aunts and uncles
- Nieces and nephews
- Half-siblings
- Grandchildren
The father’s side counts just as much as the mother’s side. Cancer-predisposition variants can be inherited from either parent, even though the pattern may be easier to notice in families containing more female relatives. Cancer Australia specifically states that paternal family history is as relevant as maternal family history.
This is one of the most easily missed details. People often say, “It was only my dad’s sister,” as though that makes the diagnosis less relevant. It does not.
What matters is the biological relationship, the type of cancer, the age at diagnosis, and the pattern across that family line.
Family-History Details That May Change the Assessment
A family history becomes more concerning when cancers cluster in close relatives, occur at younger ages, or appear in uncommon combinations.
Details worth recording include:
- Breast cancer diagnosed at age 50 or younger
- Several relatives with breast or ovarian cancer on the same side
- Male breast cancer
- More than one primary breast cancer in one person
- Breast and ovarian cancer in the same person
- Pancreatic cancer in a family containing breast or ovarian cancer
- High-grade or metastatic prostate cancer in the same family line
- Jewish ancestry in a person or family affected by breast cancer
- A known pathogenic variant in a cancer-predisposition gene
- Triple-negative or basal-type breast cancer
- Limited family information, including adoption or a very small family
Current eviQ referral guidance uses a wider range of clues than people commonly associate with the old FRABOC system. It includes breast, ovarian, pancreatic, and certain prostate cancer patterns, as well as male breast cancer, multiple primary cancers, young diagnoses, tumour characteristics, ancestry, and limited family structure.
When possible, genetic testing is generally more informative when it begins with an affected family member. Testing an unaffected relative first may produce a negative result that does not clearly explain the cancers already present in the family.
FRABOC vs iPrevent and CanRisk
FRABOC was not replaced by an identical calculator carrying a new name. Modern tools use more information and can produce more individualised estimates.
| Feature | FRABOC | iPrevent | CanRisk |
|---|---|---|---|
| Current status | Retired | Available | Available |
| Main user | GPs and nurses | Individuals and clinicians | Qualified healthcare professionals |
| Main focus | Broad family-history category | Personalised breast cancer risk and management | Breast, ovarian, and prostate cancer risk plus gene-variant probabilities |
| Information used | Mainly breast and ovarian cancer family history | Medical, reproductive, lifestyle, biopsy, and extended family history | Detailed pedigree, genetic information, lifestyle, reproductive factors, and other clinical data |
| Main output | General risk category | Ten-year and residual lifetime risk with a personalised report | Detailed multifactorial cancer and pathogenic-variant estimates |
Cancer Australia now points readers toward more current risk-assessment tools, including iPrevent. Peter MacCallum Cancer Centre describes iPrevent as a breast cancer risk-assessment and decision-support tool intended to support screening and prevention discussions between women and their doctors.
CanRisk is more specialised. It is designed for qualified healthcare professionals and can calculate future breast, ovarian, or prostate cancer risk, as well as the probability that a person carries a relevant pathogenic gene variant.
What Information Does iPrevent Use?
iPrevent takes approximately 30 minutes to complete and produces a downloadable personalised report that can be discussed with a doctor.
It asks about information such as:
- Personal medical history
- Height and weight
- Previous breast biopsy results
- Reproductive factors
- Lifestyle factors
- Previous breast conditions
- Cancer diagnoses among extended family members
The family-history section can include parents, grandparents, children, siblings, aunts, uncles, nieces, and nephews.
It asks about breast, ovarian, pancreatic, and prostate cancers, along with approximate ages at diagnosis and relatives’ years of birth.
You can complete the tool when some family details are unknown, but more accurate information can improve the quality of the estimate.
Before using it, I would gather:
- Each affected person’s relationship to you
- The maternal or paternal side of the family
- The cancer type
- Age or approximate age at diagnosis
- Whether cancer affected one or both breasts
- Any available pathology information
- Copies of genetic test reports already found in the family
iPrevent should not be used by someone who has previously had invasive breast cancer or ductal carcinoma in situ, commonly shortened to DCIS. Those situations require guidance based on the individual’s diagnosis and treatment history rather than a general prevention calculator.
What Does an iPrevent Result Mean?
iPrevent can show estimated breast cancer risk over the next ten years and residual lifetime risk up to age 80. It compares the estimate with the risk of an average woman of the same age and may present screening and prevention options connected to the calculated risk category.
A risk estimate is not a prediction that cancer will definitely occur. It describes the probability among people with similar information.
Someone with a relatively low estimate can still develop breast cancer, while many people with a higher estimate will never develop it.
I would not focus on the percentage alone. The more useful questions are:
- Was the information entered accurately?
- Does the family pattern justify a genetics referral?
- Should screening begin earlier or occur more often?
- Are medication or other prevention options worth discussing?
- When should the assessment be updated?
Family history can change. A new diagnosis in a parent, sibling, grandparent, aunt, uncle, or other close relative may alter the overall pattern.
Does FRABOC Tell You Whether You Need Genetic Testing?
No. FRABOC was never a genetic test, and a risk category did not prove that someone carried BRCA1, BRCA2, or another pathogenic variant.
Modern hereditary breast cancer assessment extends beyond BRCA1 and BRCA2. Depending on the personal and family pattern, clinicians may consider genes such as PALB2, CHEK2, ATM, and others associated with different levels of breast cancer risk.
A family cancer clinic can:
- Review a detailed family pedigree
- Estimate cancer and inherited-variant risk
- Discuss the benefits and limitations of testing
- Decide who should be tested first
- Explain screening and prevention options
- Provide genetic counselling
Cancer Australia states that family cancer clinics offer personalised risk assessments, genetic counselling and, when appropriate, genetic testing.
Genetic testing also does not always produce a simple yes-or-no answer. It may identify a pathogenic variant, find no relevant variant, or report a variant of uncertain significance.
A negative result can be less informative when no affected family member has previously received testing.
What Screening Applies After a Risk Assessment?
For women without symptoms at population risk, Cancer Australia recommends free two-yearly BreastScreen Australia mammography from ages 50 to 74.
Women aged 40 to 49 and those aged 75 or older can also access free screening mammograms, although routine invitations focus on the 50-to-74 age group.
Higher-risk screening may be different. Depending on age and individual risk, a clinician may discuss annual mammography, MRI, or specialist surveillance.
These decisions should follow current clinical guidance rather than an archived FRABOC category.
Screening is not the same as investigating symptoms. A new lump, nipple discharge, skin change, nipple change, or persistent unusual breast symptom needs medical assessment. It should not wait for an online risk calculation or the next routine screening appointment.
A Practical Family-History Checklist
Before seeing a GP or using iPrevent, write down:
- Which blood relatives had cancer
- Whether they are on the maternal or paternal side
- The exact cancer type, if known
- Age or approximate age at diagnosis
- Whether one person had more than one primary cancer
- Whether breast cancer affected both breasts
- Any ovarian, pancreatic, prostate, or male breast cancer
- Relevant pathology details
- Known genetic-test results
- Missing information caused by adoption, estrangement, early deaths, or a small family
Do not invent details when the facts are uncertain. Mark the information as unknown.
A clinician can work with gaps, but an incorrect cancer type or age at diagnosis can distort the assessment.
What to Do Next
FRABOC is best understood as a historical Australian tool that helped clinicians organise familial breast and ovarian cancer risk. It is no longer the tool to use for a current personal decision.
Collect your family cancer history, use iPrevent when appropriate, download the report, and discuss it with a GP.
Ask about referral to a family cancer clinic when the pattern includes young diagnoses, several related cancers on one side, male breast cancer, ovarian cancer, pancreatic cancer, aggressive prostate cancer, or a known pathogenic variant.
The aim is not to obtain a frightening label. It is to replace vague worry with an assessment that leads to the right screening, referral, or prevention discussion.
Medical note: This article provides general educational information and does not replace personal advice from a GP, genetic counsellor, breast specialist, or other qualified healthcare professional.
Frequently Asked Questions
What does FRABOC stand for?
FRABOC stands for Familial Risk Assessment – Breast and Ovarian Cancer, a retired Australian family-history risk tool.
Can I still complete a FRABOC assessment online?
No. Cancer Australia confirms that FRABOC is no longer available; iPrevent is the more current Australian breast cancer risk tool.
Does breast cancer on my father’s side count?
Yes. Paternal and maternal blood relatives both matter because inherited cancer-predisposition variants can come from either parent.
Does one aunt with breast cancer mean I am high risk?
Not necessarily. Her age at diagnosis, other cancers in the family, the side of the family, and your personal risk factors all affect the assessment.
Is iPrevent the same as genetic testing?
No. iPrevent estimates breast cancer risk and supports management discussions; it does not analyse DNA or confirm a pathogenic gene variant.
Sunny Mario is the Lead Editor and primary contributor at Wellbeing Junctions. With more than 8 years of experience researching health, wellness, personal development, and lifestyle topics, he focuses on creating practical, evidence-based content that helps readers make informed decisions. His work emphasizes clarity, trusted sources, and actionable guidance for everyday wellbeing.
