Hereditary Colorectal Cancer Specialist in Los Angeles

Advanced screening, surveillance, and risk-reducing surgery for families affected by Lynch syndrome, FAP, and other inherited colorectal cancer syndromes.

When Colorectal Cancer Runs in the Family

Up to 1 in 10 colorectal cancers are linked to an inherited genetic syndrome. If a parent, sibling, or multiple relatives have had colon or rectal cancer — especially before age 50 — your own lifetime risk may be significantly higher than average, and standard screening guidelines may not be enough to protect you.

Dr. Moshe Barnajian, a board-certified colorectal surgeon in Los Angeles trained at Cedars-Sinai, provides comprehensive care for patients with hereditary colorectal cancer risk: personalized surveillance colonoscopy schedules, coordination with genetic counselors, and, when appropriate, minimally invasive risk-reducing surgery.

Who Should Be Evaluated for Hereditary Risk?

A first-degree relative (parent, sibling, child) diagnosed with colorectal cancer before age 50

Multiple family members with colorectal, uterine, ovarian, or stomach cancer

A known family history of Lynch syndrome or familial adenomatous polyposis (FAP)

A personal history of 10 or more colon polyps found on colonoscopy

Colorectal cancer or advanced polyps diagnosed at a young age

Abnormal genetic test results that need a surgical consultation

How Dr. Barnajian Manages Hereditary Colorectal Cancer Risk

Care is tailored to your specific syndrome, genetics, and goals — from vigilant surveillance to definitive prevention.

Genetic Evaluation & Counseling

Coordination with genetic counselors to test for Lynch syndrome, FAP, MUTYH, and related mutations, so decisions are guided by your actual risk.

High-Risk Surveillance Colonoscopy

Earlier, more frequent colonoscopies with meticulous polyp detection and removal — the most effective way to prevent cancer in high-risk patients.

Risk-Reducing Robotic Surgery

For selected syndromes, minimally invasive da Vinci® robotic colectomy can dramatically lower cancer risk while preserving bowel function and quality of life.

Lifelong Follow-Up

A clear long-term plan for you — and guidance on screening for your children and siblings, who may share the same inherited risk.

Dr. Moshe Barnajian, colorectal surgeon Los Angeles

Why Choose Dr. Barnajian?

Board-certified colorectal surgeon (FASCRS), trained at Cedars-Sinai, specializing in minimally invasive and da Vinci® robotic surgery. Compassionate, thorough care with most PPO insurance accepted.

Call (424) 622-9028

Frequently Asked Questions

At what age should I start colonoscopy if colorectal cancer runs in my family?

In general, screening starts at age 40, or 10 years younger than the earliest cancer in your family, whichever comes first. With a confirmed syndrome such as Lynch or FAP, screening may begin in the 20s or even earlier. Dr. Barnajian will build a personalized schedule for you.

Does a family history mean I will definitely get colon cancer?

No. It means your risk is higher and screening matters more. With proper surveillance and polyp removal, the majority of hereditary colorectal cancers can be prevented entirely.

What is risk-reducing surgery?

For certain high-risk syndromes, removing most or all of the colon before cancer develops is the most effective protection. Dr. Barnajian performs these procedures robotically, through small incisions, with faster recovery than open surgery.