Cancer Ovarian Cancer What Is an Adnexal Mass? By Steven Vasilev, MD facebook linkedin Dr. Steven Anatol Vasilev is an ovarian cancer expert double board-certified in gynecologic oncology and obstetrics/gynecology." Learn about our editorial process Steven Vasilev, MD Medically reviewed by Medically reviewed by Doru Paul, MD on May 08, 2020 Doru Paul, MD, is board-certified in internal medicine, medical oncology, and hematology. Learn about our Medical Review Board Doru Paul, MD on May 08, 2020 Print Table of Contents View All Table of Contents Causes Diagnosis Management/Treatment An adnexal mass is an abnormal growth that develops near the uterus, most commonly arising from the ovaries, fallopian tubes, or connective tissues. The lump-like mass can be cystic (fluid-filled) or solid. While most adnexal masses will be benign (noncancerous), they can sometimes be malignant (cancerous). Adnexal masses may occur at any age, although they are more typically seen in women of reproductive age. skaman306 / Getty Images Causes of an Adnexal Mass There are literally hundreds of reasons why an adnexal mass may develop. In premenopausal women, they are often associated with ovarian cysts, benign ovarian tumors, endometriosis, polycystic ovary syndrome (PCOS), ectopic (tubal) pregnancy, and ovarian cancer. Since adnexal masses are relatively common, doctors have to consider a number of factors to determine the cause and classification of the growth. Red Flags While cancer is only one of many possible causes, red flags are typically raised if: The mass is solid instead of cystic. The mass is irregular in shape or density. The mass develops before menstruation begins. The mass develops after menopause. The mass is painful. When the cyst is extremely large. Diagnosis If an adnexal mass is found during a physical exam, there are several imaging tests that can aid in the diagnosis, including: Transvaginal ultrasound Computed tomography (CT) scan Magnetic resonance imaging (MRI) scan Positron emission tomography (PET) scan A pregnancy test may also be performed to help diagnose tubal pregnancy. If ovarian cancer is suspected, a CA 125 test (which measures a protein, called cancer antigen 125, in the blood) may be ordered. If the mass is cystic, the doctor may perform an aspiration to extract fluid with a needle and syringe. However, many doctors will avoid this, especially if cancer is suspected, since the extracted fluid may contain malignant cells that can seed other tumors. Management and Treatment Based on the initial findings, the doctor may either take a watch-and-wait approach, regularly monitoring for any changes in the mass, or start immediate interventions. This may include the surgical removal of the mass followed by lab evaluations. In the event of a tubal pregnancy, emergency treatment may be required to prevent a potentially life-threatening rupture, especially if the woman is symptomatic. In most cases, an adnexal mass will not be a cause for alarm and may never present any health problems to the woman. With that being said, doctors will pay particular attention to any masses or lesions that appear in or around the ovaries or in fallopian tubes. Studies have shown that growths in the fallopian tubes often serve as precursors to high-grade serous ovarian carcinomas (HGSOC) years later. HGSOC accounts for around 75% of all ovarian cancers A Word From Verywell If an adnexal mass is found and cancer is suspected, it is always best to get a second option from a gynecologic oncologist who will be more experienced in the diagnosis, staging, and of treatment of endometrial and ovarian cancers. By and large, survival times for women under the care of a gynecologic oncologist will be greater than those treated by a general surgeon. Even if the adnexal mass turns out to be benign, a gynecologic oncologist will be better able to determine when changes in the growth warrant more aggressive interventions. Was this page helpful? Thanks for your feedback! Limiting processed foods and red meats can help ward off cancer risk. These recipes focus on antioxidant-rich foods to better protect you and your loved ones. Sign up and get your guide! Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Biggs WS, Marks ST. Diagnosis and management of adnexal masses. Am Fam Physician. 2016;93(8):676-81. Brown DL, Dudiak KM, Laing FC. Adnexal masses: US characterization and reporting. Radiology. 2010;254(2):342-54. doi:10.1148/radiol.09090552 UpToDate. Management of an adnexal mass. Updated September 24, 2018. Labidi-galy SI, Papp E, Hallberg D, et al. High grade serous ovarian carcinomas originate in the fallopian tube. Nat Commun. 2017;8(1):1093. doi:10.1038/s41467-017-00962-1 Additional Reading Suh-Burgmann, E. and Kinney, W. "Potential harms outweigh benefits of indefinite monitoring of stable adnexal masses." Amer J Obstetric Gynecol. 2015; 213(6):816.e1-4. DOI: 10.1016/j.ajog.2015.09.005. Chan, K; Sherman, A.; Zapp, D. "Influence of gynecologic oncologists on the survival of patients with endometrial cancer." J Clin Oncol. 2011; 29(7):832-8. DOI: 10.1200/JCO.2010.31.2124. Dodge, J. "Management of a suspicious adnexal mass: a clinical practice guideline." Curr Oncology. 2012; 19(4):e244-57. DOI: 10.3747/co.19.980.