📖 What is C-section scar endometriosis?
If you have a painful lump in or near your caesarean scar that becomes more painful with your periods — this is almost certainly C-section scar endometriosis (also called parietal or abdominal wall endometriosis).
During caesarean section, endometrial cells can implant in the scar and grow cyclically under hormonal influence, forming a nodule that swells and hurts with each menstrual cycle. It typically appears 1–3 years after the caesarean and will not resolve spontaneously.
🎯 Recognise the symptoms
- A firm, tender lump in the C-section scar — visible or palpable
- Pain that worsens during and around your period — the hallmark sign
- Sometimes swelling or bruising of the scar during menstruation
- The pain does not improve with time — it typically worsens over years
- Confirmed by MRI (T1-hyperintense nodule) or ultrasound
🔧 Treatment: cryoablation at Cochin AP-HP
Cochin AP-HP is the world reference centre for cryoablation of C-section scar endometriosis — the largest experience globally, with the first large series published by Professor Dohan in 2014. Under CT guidance, a cryoprobe is inserted through the skin directly into the nodule. Freeze–thaw cycles at −40°C destroy the nodule without any incision. 80–95% of patients are pain-free or significantly improved.
Performed under general anaesthesia (30–40 min), as a day case. No scar. No additional incision. Return to normal activity in 5–7 days.
🔗 Related pages
🇫🇷 French version: endometriose-cesarienne.html