Clinical assessment
Symptoms, pelvic exam findings, personal history, family history, and risk factors help guide the next diagnostic steps.
Ovarian Cancer Education · Diagnosis · FIGO Staging · CA-125
Ovarian Cancer Diagnosis & Staging
Ovarian cancer diagnosis and staging help identify whether a suspicious ovarian, fallopian tube, or peritoneal finding is cancer, define the tumor type, evaluate spread, and classify the disease using imaging, blood tests, pathology, FIGO stage groups, and TNM information.
Educational information only. This page does not provide diagnosis, screening
instructions, treatment recommendations, or medical advice.
CA-125
Ultrasound
CT / MRI
FIGO
Pathology
Diagnosis Overview
How ovarian cancer may be diagnosed
Ovarian cancer evaluation may begin after symptoms, an abnormal pelvic exam, imaging findings, or a concerning blood test. Diagnosis usually combines clinical assessment, imaging, blood markers, and tissue/pathology confirmation when needed.
Imaging and blood tests
Ultrasound, CA-125, CT, MRI, and other tests may help evaluate a pelvic mass and possible spread.
Pathology and staging
Tissue evaluation can define tumor type, grade, origin, and stage-related features.
Diagnosis Pathway
Common steps in ovarian cancer evaluation
The diagnostic pathway depends on symptoms, age, imaging appearance, blood test results, risk factors, and whether cancer spread is suspected.
1
Symptom and risk review
Persistent bloating, pelvic pain, early fullness, urinary changes, bowel changes, family history, BRCA status, and Lynch syndrome history may be reviewed.
2
Pelvic examination
A pelvic exam may check for masses, tenderness, abdominal swelling, or other gynecologic findings.
3
Transvaginal or pelvic ultrasound
Ultrasound can help evaluate ovarian size, cystic or solid features, complexity, and pelvic fluid.
4
CA-125 and blood tests
CA-125 may be measured along with other blood tests. CA-125 can be elevated in ovarian cancer, but also in non-cancer conditions.
5
CT, MRI, or further imaging
Imaging may evaluate the abdomen, pelvis, lymph nodes, peritoneal surfaces, fluid, liver, chest, or other sites.
6
Biopsy, surgery, and pathology
Tissue confirmation may come from biopsy, laparoscopy, or surgery depending on the clinical plan and suspected disease pattern.
Diagnostic Map
Symptoms
Ultrasound
CA-125
CT / MRI
Pathology
Diagnostic Tests
Tests used in ovarian cancer diagnosis
No single test explains every case. Doctors may combine imaging, blood markers, examination findings, and tissue results to understand the diagnosis.
Pelvic examination
Helps assess pelvic organs, tenderness, masses, abdominal swelling, or other findings that may guide testing.
Transvaginal ultrasound
A common imaging test for ovarian and pelvic structures, useful for evaluating cystic, solid, or complex masses.
CA-125 blood test
A tumor-associated marker used in evaluation and monitoring, but not specific enough to diagnose ovarian cancer alone.
CT scan
Helps assess abdominal and pelvic spread, lymph nodes, peritoneal disease, ascites, and other body areas.
MRI
May provide detailed pelvic soft-tissue information or clarify complex pelvic findings.
Biopsy
A tissue sample may be taken in selected cases when pathology confirmation is needed before treatment planning.
Laparoscopy or surgery
Minimally invasive surgery or open surgery may be used to inspect, sample, or remove tissue and assess spread.
Genetic and tumor testing
BRCA1, BRCA2, HRD, Lynch syndrome-related genes, and tumor markers may be discussed depending on diagnosis.
CA-125
Marker
Not alone
Context
Follow-up
CA-125 Clarity
What CA-125 can and cannot tell you
CA-125 is an important ovarian cancer-related blood marker, but it is not a stand-alone diagnostic test. It may be elevated in ovarian cancer and also in benign gynecologic, inflammatory, liver, or abdominal conditions.
Useful in context
CA-125 is interpreted alongside symptoms, imaging, examination findings, age, and clinical risk.
Not specific
A high CA-125 does not automatically mean ovarian cancer, and a normal value does not always exclude it.
Monitoring role
In confirmed ovarian cancer, CA-125 may be used in follow-up or treatment-response monitoring when appropriate.
FIGO & TNM
How ovarian cancer staging works
Ovarian, fallopian tube, and primary peritoneal cancers are commonly staged using FIGO staging and TNM concepts. Staging describes where cancer is found and how far it has spread.
T
Tumor extent
Describes whether tumor is limited to ovaries/fallopian tubes, extends into pelvic structures, or involves abdominal peritoneal surfaces.
N
Lymph nodes
Describes whether cancer is found in regional lymph nodes, including retroperitoneal nodes.
M
Distant metastasis
Describes spread to distant organs or sites outside the abdomen/pelvis, such as the liver or lung tissue.
FIGO Stage
I
II
III
IV
TNM
Stage Groups
Ovarian cancer stages I to IV
Stage grouping summarizes the extent of disease. Exact staging depends on surgical, imaging, pathology, lymph-node, and metastasis findings.
Stage I
Cancer is limited to the ovary or ovaries, or fallopian tube or tubes. There is no spread outside these structures.
Stage II
Cancer involves one or both ovaries or fallopian tubes with extension into pelvic tissues, or primary peritoneal cancer within the pelvis.
Stage III
Cancer has spread to the peritoneum outside the pelvis and/or to retroperitoneal lymph nodes.
Stage IV
Cancer has spread to distant organs or distant sites, such as the inside of the liver or spleen, lung tissue, or distant lymph nodes.
Pathology
What pathology can show
Pathology helps confirm cancer type, subtype, grade, origin, and spread. It is central to diagnosis and staging when tissue is available.
Type
Tumor type
Examples include epithelial ovarian cancer, germ cell tumors, stromal tumors, and borderline tumors.
Subtype
Epithelial subtype
High-grade serous, low-grade serous, clear cell, endometrioid, and mucinous tumors may be described.
Grade
Tumor grade
Grade describes how abnormal cancer cells look and can relate to tumor behavior.
Spread
Stage-related findings
Pathology may evaluate ovarian surface involvement, capsule rupture, ascites, washings, lymph nodes, and implants.
Pathology Report
Type
Subtype
Grade
Margins
Spread
Simple Summary
Ovarian cancer diagnosis and staging in simple terms
Diagnosis identifies whether a suspicious finding is cancer. Staging explains where the cancer is located and whether it has spread.
How is ovarian cancer usually evaluated?
Evaluation may include symptom review, pelvic exam, ultrasound, CA-125 blood testing, CT or MRI imaging, and tissue/pathology confirmation.
What does FIGO staging mean?
FIGO staging is a staging system used for ovarian, fallopian tube, and primary peritoneal cancers. It groups cancer from stage I to stage IV based on spread.
Does CA-125 diagnose ovarian cancer?
No. CA-125 can support evaluation and monitoring, but it cannot diagnose ovarian cancer by itself.
FAQ
FAQ: Ovarian Cancer Diagnosis & Staging
Clear answers to common diagnosis and staging search questions.
How is ovarian cancer diagnosed?
Ovarian cancer evaluation may include symptom review, pelvic examination, transvaginal ultrasound, CA-125 blood testing, CT or MRI imaging, and tissue confirmation through biopsy or surgery when needed.
What is CA-125 in ovarian cancer?
CA-125 is a blood marker that may be elevated in ovarian cancer, but it can also be elevated in non-cancer conditions. It is interpreted with imaging and clinical context.
What imaging tests are used for ovarian cancer?
Transvaginal ultrasound, pelvic ultrasound, CT scan, and MRI may be used to evaluate ovarian masses and possible spread.
What are the stages of ovarian cancer?
Ovarian cancer is commonly grouped into stages I, II, III, and IV. Stage I is limited to the ovaries or fallopian tubes, while stage IV means distant spread.
Is this page medical advice?
No. This page is educational only and does not replace consultation with a qualified healthcare professional.
References
Scientific References
Authoritative sources used to support this ovarian cancer diagnosis and staging page.
- National Cancer Institute. Ovarian epithelial, fallopian tube, and primary peritoneal cancer PDQ.
- MSD Manual Professional. FIGO surgical staging of ovarian, fallopian tube, and peritoneal cancer.
- NHS Digital. Ovarian, fallopian tube, and primary peritoneal carcinoma staging sheets.
- American Cancer Society. Tests and staging for ovarian cancer.
- Cancer Research UK. Ovarian cancer tests, CA-125, ultrasound, CT, and stages.