Post-Ablation Syndrome

How post-ablation syndrome happens

Endometrial ablation uses heat, cold, radiofrequency or other energy to destroy the uterine lining. The uterine walls scar and may stick together. However, small areas of lining often survive, particularly in the upper corners of the uterus (the cornua) near the fallopian tubes. These areas still respond to monthly hormones and bleed. Because scar tissue blocks the exit, blood collects:

• in the uterine cavity (hematometra)
• in the corners of the uterus (cornual hematometra)
• backing up into the fallopian tubes (hematosalpinx), especially if the tubes were tied, because the blood cannot spill into the pelvis

The stretching and pressure cause cyclic pain.

Risk factors

• previous tubal ligation or other sterilization
• younger age at ablation (under about 45), with more years of hormone cycles ahead
• adenomyosis
• certain ablation techniques and repeat ablations

Symptoms

• cramping or aching pelvic pain that recurs monthly, around the expected time of a period
• pain often one-sided, in the lower abdomen or pelvis
• little, no or only spotting bleeding despite the pain
• pain that gradually gets worse over time
• pain with sex in some

Diagnosis

1. History: ablation, tubal ligation, and the cyclic nature of pain
2. Pregnancy test, because ectopic pregnancy remains possible after ablation and tubal ligation
3. Pelvic ultrasound: may show fluid in the uterine corners or swollen, blood-filled tubes. Scar tissue can make imaging difficult
4. MRI: better for small collections of trapped blood
5. Laparoscopy: sometimes needed to confirm the diagnosis

Doctors also consider adenomyosis, endometriosis, ovarian cysts and other causes of chronic pelvic pain.

Treatment

Short-term options

• NSAIDs for pain, following the label dose
• hormonal treatments to stop cycles, such as continuous progestins or combined hormonal contraceptives, which can reduce bleeding behind scars

Surgery

• Hysterectomy with removal of the fallopian tubes is the most reliable cure
• Removing the fallopian tubes (salpingectomy) alone helps some women with blood trapped in the tubes, but pain may recur
• Hysteroscopic drainage of trapped blood can be tried in selected cases, but scarring often makes this difficult and symptoms may return

Prevention

Some gynecologists suggest that women with a prior tubal ligation be counseled about this risk before ablation. Removing the tubes instead of tying them, or alternatives such as a hormonal IUD for heavy bleeding, may reduce the chance of trapped blood. An ablation also makes it harder to evaluate the lining for cancer later, so any postmenopausal bleeding must be investigated.

Outlook

Post-ablation syndrome is not dangerous but can be persistently painful. Most women who undergo hysterectomy for it have complete relief.

Frequently asked questions

What is post-ablation syndrome?

It is cyclic pelvic pain that develops after endometrial ablation, caused by regrowing patches of uterine lining that bleed behind scar tissue. The trapped blood stretches the uterus or tubes. It is more common in women who have also had a tubal ligation.

How long after an ablation can pain start?

Pain usually begins months to years after the procedure, often 1 to 5 years later. Mild cramping in the first days or weeks after ablation is normal and is not post-ablation syndrome.

What is PATSS?

PATSS stands for post-ablation tubal sterilization syndrome. It describes cyclic pain in women who have had both a tubal ligation and an endometrial ablation, where menstrual blood becomes trapped in the corners of the uterus and the tied-off tubes.

How is post-ablation syndrome treated?

Hormones and pain relievers can help temporarily, but hysterectomy with removal of the fallopian tubes is the definitive cure. Some women benefit from removal of the tubes alone, or from hysteroscopic procedures to drain trapped blood.

Can you still get pregnant after an ablation?

Pregnancy after ablation is uncommon but possible and can be dangerous, with high risks of miscarriage, ectopic pregnancy and placental problems. Reliable contraception is recommended unless you have been sterilized or are past menopause.