Bannayan Riley Ruvalcaba Syndrome: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Bannayan Riley Ruvalcaba Syndrome?
A primary care doctor often coordinates care. A medical geneticist can confirm the diagnosis and guide screening; a gastroenterologist, endocrinologist, or surgeon may also help. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is Bannayan Riley Ruvalcaba syndrome?
Bannayan Riley Ruvalcaba syndrome is a rare genetic condition, meaning it is passed down through genes, that people are born with. It causes a larger than normal head size, benign (non-cancerous) growths called hamartomas, and dark spots on the skin of the penis in males. It is part of a group of conditions that raise the lifetime risk of some cancers.
BRRS belongs to a group called PTEN hamartoma tumor syndromes. PTEN is a gene that normally helps control cell growth; when it does not work properly, cells grow too much, causing hamartomas. These lumps of normal tissue are not cancer, but the syndrome raises lifetime cancer risk.
Symptoms
Symptoms vary from person to person:
- A larger than expected head size (macrocephaly).
- Benign fatty tumors under the skin (lipomas).
- Hamartomatous polyps in the intestine, which can cause bleeding or belly pain.
- Dark spots on the skin of the penis in males.
Causes and who gets it
BRRS is caused by a mutation in the PTEN gene. A parent with the change has a one in two chance of passing it to each child, or it can appear first in a child with no family history.
How doctors diagnose it
Doctors start with a physical exam and family history. Genetic testing can confirm a PTEN change. Imaging or a colonoscopy may check for internal growths.
Treatment
There is no cure. Treatment focuses on managing each feature. Problematic growths can be surgically removed and thyroid problems treated with medicine. Regular cancer screening is recommended, and children with delays may benefit from therapy.
When to see a doctor
See a doctor for a large head size with unexplained lumps, a family history of this syndrome, or blood in the stool. Keep up with recommended screening if you have a PTEN change.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance; a concierge doctor usually charges more and often works alongside insurance. Either can be a good home base for regular follow-up and screening.
Common questions
Is Bannayan Riley Ruvalcaba syndrome a form of cancer?
No, it is not cancer itself. The growths it causes are benign, meaning they are not cancer. However, the syndrome raises the lifetime risk of certain cancers, which is why regular screening is recommended.
Can BRRS be passed to my children?
Yes, it can be. A parent with a PTEN gene change has a one in two chance of passing it to each child. Genetic testing and genetic counseling can help families understand their situation.
Do the lumps and polyps need to be removed?
Not always. Many benign growths cause no problems and can simply be watched. Doctors usually recommend removal only when a growth causes pain, bleeding, or other issues, or when testing shows something concerning.
How is BRRS different from Cowden syndrome?
Both are caused by changes in the PTEN gene and are part of the same group of conditions. They share many features. However, BRRS is more often linked to a large head size and the skin findings seen in males. Doctors sometimes view them as different points on one spectrum.
Sources
- NIH Genetic and Rare Diseases Information Center - Bannayan-Riley-Ruvalcaba syndrome
- MedlinePlus Genetics - Bannayan-Riley-Ruvalcaba syndrome
- MedlinePlus Genetics - PTEN gene
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
