NORMAL RESIDUAL MYOMETRIAL THICKNESS (RMT)
📄 Normal residual myometrial thickness (>3.5 mm)
THINNED MYOMETRIUM AT SCAR SITE
📄 Mildly reduced RMT (2.5–3.5 mm)
📄 Moderately reduced RMT (1.5–2.5 mm)
📄 Severely reduced RMT (<1.5 mm)
CESAREAN SCAR DEFECT (NICHE)
📄 Triangular anechoic defect at lower uterine segment
📄 Hypoechoic scar niche with thinned overlying myometrium
📄 Large niche involving >50% myometrial thickness
SCAR DEHISCENCE / RUPTURE RISK
📄 Critically thin RMT (<1.0 mm)
📄 Bulging of gestational sac at scar site
📄 Poorly visualized or discontinuous myometrium
PREGNANCY-RELATED SCAR CONDITIONS
📄 Cesarean scar pregnancy
📄 Low-implanted gestational sac over scar
📄 Placenta accreta spectrum risk (thin RMT with placental lacunae)
POSTPARTUM / NON-PREGNANT SCAR ASSESSMENT
📄 Well-healed cesarean scar
📄 Scar niche with retained fluid
📄 Scar-related abnormal uterine bleeding
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