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Fibroids vs Adenomyosis on Ultrasound: Uterus Scans and Further Assessment
Fibroids and adenomyosis can both be investigated when someone has heavy or painful periods, but they are different conditions. Ultrasound helps assess the uterus. Symptoms and examination findings guide which test is appropriate and whether additional assessment is needed.
What does ultrasound show about fibroids?
An ultrasound can identify fibroids and describe their number, location and size. Some are discovered incidentally during another scan. These details help the gynaecologist relate the findings to symptoms and discuss whether observation or treatment is appropriate.
The scan may be performed through the abdomen, through the vagina or using both approaches. If treatment planning needs additional detail, another investigation may be recommended. For example, MRI may be used in selected patients considering uterine artery embolisation.
How is suspected adenomyosis assessed?
Adenomyosis can be difficult to diagnose because its symptoms overlap with other conditions. Ultrasound and sometimes MRI contribute to assessment. In the context of heavy menstrual bleeding with significant period pain or a bulky, tender uterus, NICE recommends transvaginal ultrasound as the preferred initial imaging examination for suspected adenomyosis.
If an internal scan is declined or unsuitable, discuss alternatives with the clinician. An abdominal scan or MRI may be considered, with an explanation of the limitations. Your consent and the clinical question should guide the approach.
What should you check in the report?
| Report detail | Useful follow-up question |
|---|---|
| Fibroid size and location | Could this finding help explain my symptoms? |
| Possible adenomyosis | How confident is the assessment, and is another test needed? |
| Incomplete or limited examination | What could not be assessed adequately? |
| Comparison with earlier imaging | Has anything changed enough to affect the plan? |
Why further tests may be needed
Not all heavy bleeding or pelvic pain is caused by fibroids or adenomyosis. Polyps, endometriosis and abnormalities of the womb lining are among other possible considerations. A scan finding should not automatically be treated as the explanation for every symptom.
Ask whether the planned examination can answer the specific question about the uterine cavity or lining. If the result is uncertain, the next step should be agreed with the gynaecologist rather than assumed from a generic report phrase.
Preparing for your appointment
Bring previous pelvic scans and a record of your symptoms, including changes in bleeding or pain. Confirm whether you should arrive with a full bladder or empty it for an internal examination. Ask who will explain the result and whether a follow-up appointment is already arranged.
An ovarian finding is a separate issue from a uterine finding; our ovarian cyst ultrasound guide covers that distinction. Clinics sourcing gynaecology ultrasound machines in Pakistan should confirm probe compatibility and the intended examination workflow before purchase.
Sources
NHS: fibroids; NHS: adenomyosis; NICE: investigation of heavy menstrual bleeding; UCLH: fibroid diagnosis and imaging. Reviewed 13 November 2026. General education; individual findings need clinical interpretation.