Ovarian Cancer: Diagnosis and Staging
Cancer
Obie Editorial Team
If you have any of the most common symptoms of ovarian cancer, which include frequent bloating, pain in the pelvis, difficulty eating, and urinary issues, it is important to schedule an appointment with your doctor. This will determine if the symptoms are caused by ovarian cancer or another health issue. Your doctor will often request information regarding your personal and family medical history at your appointment.
The most common tests for ovarian cancer include:
Physical Exam: Your physician will check your general health by pressing on your abdomen to feel for tumors or an abnormal fluid buildup. A fluid sample may be taken to check for ovarian cancer cells.
Pelvic Exam: Your physician will examine your ovaries and nearby organs to check for any abnormalities. However, a Pap test will not be used to collect ovarian cancer cells since it is primarily used to diagnose cervical cancer.
Blood Test: Blood tests will be used to check for levels of CA-125, a substance on the surface of ovarian cancer cells and some healthy tissue. High levels of CA-125 could indicate ovarian cancer, yet this testing cannot be used as the sole diagnosis of ovarian cancer. High CA-125 levels could also indicate endometriosis or uterine fibroids, so this test is not an absolute indicator of cancer.
Ultrasound: An ultrasound will examine the ovaries and internal organs to look for an ovarian tumor. A transvaginal ultrasound may also be used to better check the ovaries.
Biopsy: A biopsy will remove tissue or fluid to check for ovarian cancer cells. Depending upon the results of a blood test and ultrasound, a laparotomy may be recommended to remove fluid and tissue from the abdomen. Laparotomy surgery is often necessary to confirm the diagnosis of ovarian cancer.
If early ovarian cancer is detected, a laparoscopic procedure may be used to remove a small cyst or tumor through a minimal incision in the abdomen. This procedure can also be used to detect if ovarian cancer has spread.
Ovarian Cancer Staging
Tx: No description of the tumor's extent is possible because of incomplete information.
T1: The cancer is confined to the ovaries -- one or both.
T2: The cancer is in one or both ovaries and is extending into pelvic tissues.
T3: The cancer is in one or both ovaries and has spread to the abdominal lining outside the pelvis. This lining is called the peritoneum.
Tx: No description of the tumor's extent is possible because of incomplete information.
Tis: Cancer cells are only in the inner lining of the fallopian tube. They haven’t grown into deeper layers. Also called carcinoma in situ.
T1: The cancer is in the fallopian tube(s), but has not grown outside of them.
T2: The tumor has grown from one or both fallopian tubes into the pelvis.
T3: The tumor has spread outside the pelvis to the lining of the abdomen.
N categories indicate whether or not cancer has spread to regional (nearby) lymph nodes.
Nx: No description of lymph node involvement is possible because of incomplete information.
N0: No lymph node involvement.
N1: Cancer cells are found in the lymph nodes close to the tumor.
M categories indicate whether or not cancer has spread to distant organs, such as the liver, lungs, or non-regional lymph nodes.
M0: No distant spread.
M1: Cancer has spread to the inside of the liver, to the lungs, or other organs.
Once a patient's T, N, and M categories have been determined, this information is combined in a process called stage grouping to determine the stage, expressed in Roman numerals from stage I (the least advanced stage) to stage IV (the most advanced stage). The following table illustrates how TNM categories are grouped together into stages. This stage grouping also applies to fallopian tube carcinoma.
The cancer is still contained within the ovary (or ovaries). It has not spread outside the ovary.
Stage IA (T1a, N0, M0): Cancer has developed in one ovary, and the tumor is confined to the inside of the ovary. There is no cancer on the outer surface of the ovary. Laboratory examination of washings from the abdomen and pelvis did not find any cancer cells.
Stage IB (T1b, N0, M0): Cancer has developed within both ovaries without any tumor on their outer surfaces. Laboratory examination of washings from the abdomen and pelvis did not find any cancer cells.
Stage IC (T1c, N0, M0): The cancer is present in one or both ovaries and one or more of the following are present:
Stage II
The cancer is in one or both ovaries and has involved other organs (such as the uterus, fallopian tubes, bladder, the sigmoid colon, or the rectum) within the pelvis. It has not spread to lymph nodes, the lining of the abdomen (called the peritoneum), or distant sites.
Stage IIA (T2a, N0, M0): Cancer has spread to or has invaded (grown into) the uterus or the fallopian tubes, or both. Laboratory examination of washings from the abdomen did not find any cancer cells.
Stage IIB (T2b, N0, M0): Cancer has spread to other nearby pelvic organs such as the bladder, the sigmoid colon, or the rectum. Laboratory examination of fluid from the abdomen did not find any cancer cells.
Stage IIC (T2c, N0, M0): Cancer has spread to pelvic organs as in stages IIA or IIB and cancer cells were found when the fluid from the washings from the abdomen was examined under a microscope.
Cancer involves one or both ovaries, and one or both of the following are present: (1) cancer has spread beyond the pelvis to the lining of the abdomen; (2) cancer has spread to lymph nodes.
Stage IIIA (T3a, N0, M0): During the staging operation, the surgeon may be able to see cancer involving the ovary or ovaries, but no cancer is visible to the naked eye in the abdomen and cancer has not spread to lymph nodes. However, when biopsies are checked under a microscope, tiny deposits of cancer are found in the lining of the upper abdomen.
Stage IIIB (T3b, N0, M0): There is cancer in one or both ovaries, and deposits of cancer large enough for the surgeon to see, but smaller than 2 cm (about 3/4 inch) across, are present in the abdomen. Cancer has not spread to the lymph nodes.
Stage IIIC: The cancer is in one or both ovaries, and one or both of the following are present:
This is the most advanced stage of ovarian cancer. In this stage, cancer has spread to the inside of the liver, the lungs, or other organs located outside of the peritoneal cavity. (The peritoneal cavity or abdominal cavity is the area enclosed by the peritoneum, a membrane that lines the inner abdomen and covers most of its organs.) Finding ovarian cancer cells in the fluid around the lungs (called pleural fluid) is also evidence of stage IV disease.
Recurrent ovarian cancer: This means that the disease went away with treatment but then came back (recurred).
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Source: "How is ovarian cancer staged?." American Cancer Society: Information and Resources for Cancer: Breast, Colon, Prostate, Lung and Other Forms. N.p., n.d. Web. 5 Oct. 2011.
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