Cesarean scar niche
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At the time the article was created Yuranga Weerakkody had no recorded disclosures.View Yuranga Weerakkody's current disclosures
At the time the article was last revised Sze Yuen Lee had no financial relationships to ineligible companies to disclose.View Sze Yuen Lee's current disclosures
The term cesarean scar niche (defect) refers to the presence of a hypoechoic area within the myometrium in the isthmus (lower uterine segment) with discontinuation of myometrium at the site of a previous cesarean section scar. A niche has been described as the indentation of myometrium of around 1-2 mm 1,4 due to tethering of the endometrium.
They are encountered in various shapes such as:
- semicircular: considered commonest 4
- triangular: next commonest 4
- inclusion cysts
Due to tethering of the endometrium, blood accumulates in a niche and may serve as a source of dysfunctional uterine bleeding, accounting for spotting 2-12 days after the routine menstrual cycle 5.
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