A nabothian cyst is a mucus-filled lump on the surface of the cervix.
The cervix is located at the lower end of the womb (uterus) at the top of the vagina. It is about 1 inch (2.5 centimeters) long.
The cervix is lined with glands and cells that release mucus. The glands can become covered by a type of skin cells called squamous epithelium. When this happens, the secretions build up in the plugged glands. They form a smooth, rounded bump on the cervix. The bump is called a nabothian cyst.
Each nabothian cyst appears as a small, white raised bump. There can be more than one.
Exams and Tests
During a pelvic exam, the health care provider will see a small, smooth, rounded lump (or collection of lumps) on the surface of the cervix. Rarely, magnifying the area (colposcopy) may be needed to tell these cysts from other bumps that can occur.
Sometimes the cyst is opened to confirm the diagnosis.
No treatment is necessary. Nabothian cysts do not cause any problems.
Nabothian cysts do not cause any harm. They are a benign condition.
The presence of many cysts or cysts that are large and blocked can make it hard for the health care provider to do a Pap test. This is rare.
When to Contact a Medical Professional
Most of the time, this condition is found during a routine pelvic exam.
There is no known prevention.
Choby BA. Cervical polyps. In: Pfenninger JL, Fowler GC, eds. Pfenninger and Fowler's Procedures for Primary Care. 3rd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 135.
Lentz GM. History, physical examination, and preventive health care. In: Lentz GM, Lobo RA, Gershenson DM, Katz VL, eds. Comprehensive Gynecology. 6th ed. Philadelphia, PA: Elsevier Mosby; 2012:chap 7.
Review Date 11/5/2015
Updated by: Cynthia D. White, MD, Fellow American College of Obstetricians and Gynecologists, Group Health Cooperative, Bellevue, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.