Hereditary Cancer and Genetic Testing

OncoGuide

Hereditary Cancer Care

Hereditary Cancer Treatment Hospital in Banjara hills, Hyderabad

A Family Guide to Risk prevention and Informed Decisions

Cancer is common, but hereditary cancer is relatively rare though very important to identify. Only about 5–10% of cancers occur due to inherited gene mutations passed down through families. Recognizing families with this risk helps doctors detect cancer earlier and, in some cases, even prevent it.

Understanding Genetic Vs Non-Genetic Cancer

Most cancers develop due to aging, lifestyle, environmental exposure, or random cell changes. These are not inherited.
Hereditary cancers occur when a person is born with a mutation in a protective gene, such as:

BRCA1 / BRCA2 – breast, ovarian, prostate, pancreatic cancers

TP53 – Li-Fraumeni syndrome (multiple early cancers)

MLH1, MSH2, MSH6, PMS2 – Lynch syndrome

APC – familial adenomatous polyposis

RET – medullary thyroid cancer

These genes normally act as safety systems. When altered, cancer risk increases — but cancer is still not guaranteed.

Family Scenarios: Do You Recognize Your Story?

“No One in My Family Has Had Cancer.”

You look across three generations. No cancers.
In this case, your risk is similar to the general population. Routine age-based screening is appropriate. Genetic testing is not required.
“A Relative Had Cancer at 70.”
“My Mother Had Breast Cancer at 38.”
“Two Close Relatives Had the Same Cancer.”
“One Person Had Two Different Cancers.”
“There Is Male Breast Cancer in the Family.”
“My Sister Tested BRCA Positive.”

A Public Example: Preventive Surgery

When actress Angelina Jolie publicly shared her BRCA1 mutation and decision to undergo preventive mastectomy and later preventive oophorectomy, it brought global attention to hereditary cancer prevention.
Her case illustrates that:

Genetic testing can identify high risk

Preventive surgery can dramatically reduce cancer risk

The decision must be personal, informed, and medically guided

Not every mutation carrier requires surgery, but for selected individuals, risk-reducing mastectomy or removal of ovaries can reduce cancer risk by over 90%.

Preventive Options in Hereditary Cancer

If a mutation is identified, management may include:

Enhanced Surveillance

Earlier and more frequent screening such as MRI breast, colonoscopy, thyroid ultrasound, or PSA testing depending on gene type.

Risk-Reducing Medication

Certain medications may reduce breast cancer risk in selected patients.

Preventive Surgery

Bilateral risk-reducing mastectomy

Risk-reducing salpingo-oophorectomy (ovary removal)

Prophylactic colectomy in familial polyposis

These decisions depend on age, mutation type, and personal preference.

Genetic Counselling and Hereditary Risk Assessment

We evaluate patients with:

Early-onset cancers

Strong family history

Multiple cancers in the same individual

Breast–ovarian clustering

Colorectal cancer patterns

Where indicated:

Gene panel testing (including BRCA and relevant markers)

Risk stratification

Family counselling

Preventive surveillance planning

Genetics influences both treatment and long-term family health planning.