Lynch syndrome
nonpolyposis cancer (HNPCC) is a hereditary to cancer.
Underlined words are explained — tap any of them.
The sections below are general education drawn from public guidelines (NHS, Mayo, CPIC, WHO, ICMR). They are not individually reviewed by a clinician and are not medical advice — always talk to a doctor about your own health.
When to see a doctor
See a doctor if several close relatives have had bowel, womb, or other cancers, especially at younger ages, or if you have a change in bowel habits, blood in your stool, or unexplained weight loss. This condition raises cancer risk, so screening matters.
Get prompt care for heavy rectal bleeding, severe ongoing belly pain, or unexplained rapid weight loss. If you already know Lynch syndrome runs in your family, ask about genetic counselling even if you feel well.
General guidance, not a diagnosis. When in doubt, see a doctor.
Questions to ask your doctor
- ?Does my family history suggest I should have genetic counselling or testing?
- ?Which cancer screenings should I have, and how early should they start?
- ?How often do I need colonoscopy or other checks?
- ?Which symptoms should never be ignored?
- ?Should my relatives be tested too?
- ?What lifestyle steps lower my overall risk?
What to note before your visit
- ·which relatives had cancer and at what ages
- ·any change in bowel habits or bleeding
- ·unexplained weight loss or tiredness
- ·results of any past screening tests
Test yourself
0/4 answered4 quick questions on Lynch syndrome. Tap an answer to check it.
Across the cancer gene set (BRCA1, BRCA2, MLH1, MSH2, TP53), 108 -'' are actually seen in South Asians () - many European-absent and still clinically 'uncertain'. For lynch , that's a pool of computationally-damaging, India-relevant, clinically-unresolved variants no one has systematically characterised.
A study that would help: Take the South-Asian-observed, European-absent, ClinVar-uncertain in BRCA1, BRCA2, MLH1, MSH2, TP53 and them for lynch : functional or family segregation to move them from 'uncertain' to a real call. Each is a usable diagnostic result.