Cancer Related
CA 125 Blood Test
£72.00
Evaluate your ovarian health and monitor specific conditions with a private Cancer Antigen 125 (CA 125) blood test at Medical Diagnosis Victoria (MDX Victoria) in London.
This test measures the level of the CA 125 protein circulating in your bloodstream. It is most commonly used by specialists to support the diagnosis of ovarian cancer, monitor the effectiveness of ongoing treatments, and provide essential follow-up surveillance for patients managing known ovarian malignancies.
With a 5-day turnaround, this specialist referral laboratory assay delivers the reliable diagnostic data your doctor needs to assess complex ovarian conditions and guide targeted clinical care.
Gynaecology & Tumour Marker Screening
Private CA 125 Blood Test in London
Are you experiencing persistent abdominal bloating, pelvic discomfort, or changes in urinary urgency, or are you monitoring a known ovarian condition? At Medical Diagnosis Victoria (MDX Victoria), we provide a private Cancer Antigen 125 (CA 125) blood test. This targeted assay measures the concentration of the CA 125 glycoprotein in your bloodstream, assisting clinicians in investigating ovarian disease, assessing complex pelvic masses, and tracking post-treatment recovery. Our expert clinical team in central London delivers discreet, attentive care with results available in 5 days.
📊 Test Specifications
Clinic Testing Fee
£72.00
+ £24.00 Phlebotomy Fee
Sample RequiredBlood Sample
Turnaround Time5 Days Processing
PreparationNo special instructions
StatusReferral Laboratory Analysis
Diagnostic Focus
What is the Cancer Antigen 125 (CA 125) Test?
Cancer Antigen 125 (CA 125) is a high-molecular-weight glycoprotein found on the surface of many ovarian cancer cells and produced by epithelial tissues lining the peritoneum, pleura, and fallopian tubes. When ovarian tissue undergoes malignant transformation or when peritoneal surfaces become significantly inflamed, excess CA 125 sheds into circulation. While not an isolated standalone diagnostic test, measuring circulating CA 125 is an essential clinical component alongside pelvic imaging to identify ovarian pathology and track treatment response.
Ovarian Assessment
Evaluating this biomarker helps to:
- Support the diagnosis of ovarian cancer
- Evaluate suspicious pelvic or adnexal masses
- Assess persistent abdominal swelling or pain
- Guide clinical referral to gynaecological oncology
Therapy & Monitoring
This test is highly useful because it:
- Tracks response to chemotherapy treatment
- Assesses surgical clearance following tumour resection
- Monitors long-term recurrence in known malignancy
- Provides objective biochemical tracking
Benign Pelvic Evaluation
The laboratory provides critical data to:
- Investigate severe endometriosis
- Assess complex uterine fibroids
- Evaluate pelvic inflammatory conditions
- Support comprehensive women’s health panels
Clinical Uses
Why is Blood Testing for CA 125 Important?
Early symptoms of ovarian conditions are frequently subtle and easily mistaken for common digestive complaints like IBS. National clinical guidelines, including NICE guidelines in the UK, recommend testing serum CA 125 as a primary diagnostic triage in women experiencing frequent or persistent pelvic and abdominal symptoms.
Evaluating Persistent Physical Symptoms
Clinicians advise investigating serum CA 125 if you experience any of the following symptoms persistently—especially if occurring 12 or more times per month:
- Persistent, non-fluctuating abdominal bloating or increased abdominal girth.
- Ongoing pelvic pain or lower abdominal discomfort.
- Early satiety, reduced appetite, or feeling full quickly after eating small meals.
- Increased urinary urgency or frequency not attributed to a confirmed urinary tract infection (UTI).
Ongoing Clinical Surveillance & Follow-Up
The CA 125 blood test is an established surveillance marker in several specialized contexts:
- Routine follow-up in patients undergoing therapy for epithelial ovarian, fallopian tube, or primary peritoneal cancer.
- Serial monitoring post-treatment to detect early asymptomatic recurrence before lesions become visible on scans.
- Part of multidisciplinary risk evaluation (such as calculating the Risk of Malignancy Index / RMI) alongside pelvic ultrasound.
Understanding Ovarian Health & Gynaecological Symptoms
A quantitative CA 125 test provides crucial diagnostic evidence for you and your physician. For additional clinical guidance on recognizing symptoms and diagnosis of ovarian conditions in the UK, consult the official NHS guide on ovarian cancer.
Clinic Excellence
Why Choose Medical Diagnosis Victoria (MDX Victoria)?
Specialist Referral Laboratory Analysis
Your blood sample is handled with stringent temperature and quality controls before analysis at an accredited referral laboratory using validated chemiluminescent immunoassay technology.
Reliable 5 Day Turnaround
We ensure seamless sample transportation and laboratory processing so your comprehensive pathology report is securely delivered within 5 days.
Central London Care
Conveniently situated in Victoria, our clinic provides a warm, respectful, and fully private setting for your diagnostic blood tests.
Clear Pricing
£72.00 test fee plus a £24.00 blood draw fee with no hidden costs. Our experienced practitioners ensure your visit is completely straightforward.
Pathology Reports
How To Read Your Laboratory Results
Your report will specify your serum CA 125 level in units per millilitre (U/mL). A value below 35 U/mL is generally considered within normal parameters, though a normal reading cannot completely rule out early ovarian disease. If your result is 35 U/mL or higher, it does not confirm a malignancy on its own; benign causes like fibroids, endometriosis, adenomyosis, or pelvic infections frequently cause elevations. Your doctor will interpret this level in combination with your menopausal status, symptoms, and pelvic ultrasound imaging.
Results Timeline: Your specialist diagnostic report is typically available within 5 days of your blood draw.
Medical Consultation
Need Help? Private GP Consultations
Tumour markers and gynaecological symptoms require sensitive, thorough medical evaluation. If your CA 125 result is elevated or if you are troubled by persistent bloating and pelvic discomfort, our private GP service is available on site. Our clinicians can review your results, organise pelvic ultrasound scans, check complementary markers (such as HE4 or CEA), and coordinate prompt referrals to consultant gynaecologists.
Clinic Support
Frequently Asked Questions
Do I need to fast before a CA 125 blood test?
No special fasting is required before a CA 125 blood test. You may eat and drink normally prior to your appointment. However, active menstruation can sometimes cause a mild, temporary rise in CA 125 levels, so you may wish to discuss timing with your clinician.
Does an elevated CA 125 level mean I have ovarian cancer?
Not necessarily. While CA 125 is elevated in the majority of advanced ovarian cancers, several benign conditions can also raise levels, including endometriosis, uterine fibroids, pelvic inflammatory disease (PID), ovarian cysts, liver disease, and even normal menstruation.
How quickly will I receive my CA 125 test results?
Because this biomarker requires precise quantitative immunoassay testing performed at our accredited referral laboratory, your comprehensive report will be securely delivered within 5 days.
Is the phlebotomy fee included in the £72.00 price?
No, the £24.00 phlebotomy service fee is separate and covers the professional blood draw carried out by our experienced healthcare team at our central Victoria clinic.
What is considered a normal CA 125 level?
In most clinical laboratories, a CA 125 reading below 35 U/mL (units per millilitre) is considered within the standard reference range. Readings at or above 35 U/mL generally warrant further clinical assessment, pelvic ultrasound, or specialist gynaecological review.
Online Trends
Most Searched Online Questions About CA 125
Can endometriosis or ovarian cysts cause high CA 125?
Yes. Endometriosis, adenomyosis, benign ovarian cystadenomas, and pelvic inflammation irritate the peritoneal lining, which can stimulate increased production of CA 125, often causing mild to moderate elevations in premenopausal women.
Is CA 125 effective as a routine screening test for all women?
Routine population screening with CA 125 in asymptomatic women is not recommended by the NHS or international guidelines. This is because CA 125 can be normal in early-stage ovarian cancers and elevated in many harmless conditions, leading to false reassurance or unnecessary invasive procedures. It is most effective when applied to symptomatic individuals or for monitoring diagnosed cases.
What is the Risk of Malignancy Index (RMI)?
The Risk of Malignancy Index (RMI) is a validated clinical formula used by gynaecologists to evaluate pelvic masses. It combines your absolute CA 125 level, your menopausal status, and specific ultrasound features of the mass to determine the likelihood of malignancy and plan appropriate surgical care.
Related Health Categories
Book Your Private Blood Test in London Today
Take Control of Your Gynaecological Health
Stop guessing about persistent abdominal bloating, unexplained pelvic pain, or complex ovarian health concerns. Secure your Cancer Antigen 125 (CA 125) blood test at Medical Diagnosis Victoria (MDX Victoria) today. Visit our welcoming, discreet London clinic and let our expert clinical team support your health journey with clear, accurate diagnostic answers.
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