Plasmacytoma: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Plasmacytoma?
A hematologist, a doctor who treats blood and bone marrow conditions, usually manages care. Radiation oncologists and surgeons may be involved depending on the tumor's location. A primary care doctor often coordinates the first tests and referrals. 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 it is
A plasmacytoma is a rare growth made of plasma cells, white blood cells that normally make antibodies to fight infection. One type grows inside bone; the other grows in soft tissue, often in the mouth, throat, or sinuses.
A plasmacytoma is related to multiple myeloma, which affects plasma cells throughout the body. Some people with a plasmacytoma later develop multiple myeloma, so long term follow up is common.
Symptoms
Symptoms depend on where the growth is. A bone plasmacytoma often causes pain at that spot, and the weakened bone can break more easily. A soft tissue growth may cause a lump, nosebleeds, trouble breathing through the nose, or trouble swallowing. Some people have no symptoms.
Causes and who gets it
Doctors do not know exactly what causes a plasmacytoma. It starts when one group of plasma cells grows out of control. It is rare, more common in men, and usually appears after age 50.
How doctors diagnose it
Doctors start with a physical exam. Imaging such as X-rays, MRI, or CT scans shows where the growth is. A biopsy confirms the diagnosis, and blood and urine tests help rule out multiple myeloma.
Treatment
The most common treatment is radiation therapy aimed at the tumor. Surgery may be an option, especially for soft tissue growths. Some people also receive medicines such as chemotherapy. Regular checkups afterward watch for the growth returning or changing into multiple myeloma.
When to see a doctor
See a doctor for ongoing bone pain, a lump that does not go away, frequent nosebleeds, or trouble breathing or swallowing. Anyone diagnosed with a plasmacytoma should keep all follow up appointments, even when feeling well.
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 steady partner during diagnosis and follow up. They can manage the early workup and coordinate referrals to a hematologist.
Common questions
Is a plasmacytoma the same as cancer?
Yes, it is considered a form of cancer because abnormal plasma cells grow where they should not. However, it is usually limited to one area, unlike multiple myeloma.
Will a plasmacytoma turn into multiple myeloma?
It can in some people. That is why doctors recommend years of regular follow up after treatment. Blood and urine tests at checkups help watch for this change.
How is a plasmacytoma different from multiple myeloma?
A plasmacytoma is one growth in a single spot. Multiple myeloma affects plasma cells in many parts of the bone marrow at once. Tests on blood, urine, and imaging help doctors tell the two apart.
Can a plasmacytoma come back after treatment?
It can return in the same area or appear elsewhere. Doctors use exams, imaging, and lab tests to monitor for this.
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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.
