Pigmented Villonodular Synovitis: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Pigmented Villonodular Synovitis?
A primary care doctor is often the first doctor a person sees for joint swelling and pain. That doctor can start the evaluation and usually refers the patient to an orthopedic surgeon, a specialist in surgery of bones and joints. Some patients also see a rheumatologist, who treats joint and autoimmune diseases.
What is pigmented villonodular synovitis?
Pigmented villonodular synovitis, often called PVNS, is a rare condition in which the soft lining inside a joint, called the synovium, grows too much and becomes inflamed. The synovium normally makes a small amount of fluid that keeps the joint moving smoothly. In PVNS, the extra tissue can damage nearby cartilage and bone over time.
Symptoms
PVNS usually affects one joint, most often the knee or hip. The joint may swell, feel warm, and ache, and the swelling often lasts a long time. Many people notice stiffness and trouble moving the joint fully, and some feel a locking, catching, or popping sensation.
Causes and who gets it
Doctors do not know exactly what causes PVNS. Research suggests gene changes may make the lining cells grow too quickly. It is not passed down in most cases and is not caused by injury or infection. PVNS is rare and most often appears in young and middle-aged adults.
How doctors diagnose it
Doctors start by asking about symptoms and examining the joint. Imaging tests such as X-rays, ultrasound, or MRI can show extra tissue and fluid. Sometimes doctors draw joint fluid with a needle; it may look brown or bloody. To confirm the diagnosis, a surgeon may examine a small tissue sample under a microscope.
Treatment
The main treatment is surgery to remove the extra tissue. The type of surgery depends on whether the growth is in one spot or spread throughout the joint lining. Because PVNS can come back, doctors usually monitor the joint with regular follow-up visits and imaging.
When to see a doctor
See a doctor if a joint stays swollen, warm, or painful for more than a few days, especially without an injury, or if it locks, catches, or will not move normally. Early evaluation can help protect the joint from lasting damage.
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 starting point for joint problems. These doctors often have longer appointments, making it easier to talk through symptoms and plan next steps. They can order imaging, draw joint fluid, and manage follow-up visits. When PVNS is suspected, they will refer the patient to an orthopedic surgeon or rheumatologist and can handle ongoing check-ins after treatment.
Common questions
Is PVNS cancer?
No, PVNS is not cancer. The extra tissue grows in a way that resembles a tumor, but it does not spread to other parts of the body.
Does PVNS come back after treatment?
It can. Surgery removes the extra tissue, but the condition returns in some people, so doctors usually watch the joint over the following years.
Can PVNS affect more than one joint?
It usually affects only one joint at a time. In rare cases, more than one joint can be involved.
Is PVNS the same as arthritis?
No, but long-lasting PVNS can damage cartilage and lead to arthritis, which is wear and breakdown of the joint surfaces.
Sources
- NIH Genetic and Rare Diseases Information Center - Tenosynovial giant cell tumor, diffuse type
- American Academy of Orthopaedic Surgeons - Tenosynovial Giant Cell Tumor - Pigmented Villonodular Synovitis
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.
