What is the difference and why it matters for you
Many patients come to me and ask one question.
“If HIFU works for fibroids, will it work the same for adenomyosis?”
The short answer is no.
These two conditions look similar on scan.
But they behave very differently during treatment.
Understanding the Difference
A fibroid is a well-defined growth.
It has a capsule.
This capsule acts like a boundary.
Adenomyosis is different.
There is no capsule.
The disease spreads inside the muscle of the uterus.
Sometimes it reaches the outer layer.
Sometimes it comes close to the inner lining.
This difference changes everything.
How HIFU Works in Fibroids
HIFU uses focused ultrasound energy to generate heat.
In fibroids:
- The energy is contained within the capsule
- The heat stays inside the fibroid
- We can destroy the fibroid completely
This makes fibroids ideal for HIFU.
After treatment:
- The fibroid shrinks over time
- Symptoms improve
- You can usually try for pregnancy after 4 to 6 months
Why Adenomyosis is More Difficult
Adenomyosis has no clear boundary.
So during HIFU:
- The energy cannot be contained
- We must protect the uterus
- We leave a safety margin of about 1 to 1.5 cm
Because of this:
- We cannot treat the entire disease
- Only about 70 to 80 percent can be ablated
This is a key limitation.
What Happens After HIFU for Adenomyosis
Treatment does not stop after HIFU.
I usually give a GnRH analogue injection soon after the procedure.
This helps to shrink the remaining disease.
Then the plan depends on your goals.
If you are not planning pregnancy
- Hormonal treatment is important
- Options include Dienogest or Mirena IUCD
- This helps reduce recurrence
If you are planning pregnancy
- If you have frozen embryos, transfer after about 3 months
- If you are trying naturally, do not delay
- If no pregnancy after 6 months, consider IVF
Risk of Recurrence
Fibroids:
- Lower recurrence if fully treated
Adenomyosis:
- Higher chance of recurrence
- Some patients may need repeat treatment
What You Should Take Away
- Fibroids are easier to treat with HIFU
- Adenomyosis is more complex
- Treatment for adenomyosis is usually partial
- Follow-up therapy is important
Most importantly, treatment must be tailored to your goals, especially if you are planning pregnancy.