O-RADS US standardizes adnexal mass risk stratification to minimize unnecessary surgeries, categorizing lesions from O-RADS 1 (normal) to O-RADS 5 (>50% malignancy risk) . Key Discriminators:…
Based on the landmark 2025 study by Syngelaki et al. a routine 36-week ultrasound is essential, as nearly 32% of all prenatally diagnosed anomalies are first detected at this stage. A dedicated…
The 2023 International Evidence-Based Guidelines significantly updated the criteria for polycystic ovarian morphology (PCOM): Threshold: Polycystic ovarian morphology (PCOM) is defined as >/= 20…
Both a normal corpus luteum and an ectopic pregnancy can demonstrate the vascular "Ring of Fire" sign on ultrasound. These features favor an ectopic pregnancy will move separately from the ovary when…
Umbilical artery Doppler significantly reduces perinatal mortality in IUGR fetuses. While decreased diastolic flow shows rising placental resistance, reversed end-diastolic velocity is a catastrophic…
When monitoring a fetus with suspected intrauterine growth restriction (IUGR) and unknown menstrual dates, traditional biometry (like the abdominal circumference) is unreliable for establishing…
The leakage of spinal fluid in spina bifida causes hindbrain herniation (Chiari malformation), pulling the cerebellum downward into a curved "banana" shape and causing the frontal bones to collapse…
Monochorionic-monoamniotic twins share a single amniotic sac, placing them at extreme risk for umbilical cord entanglement. On B-mode, this appears as an intricate "mass of cords" between the…
Determining chorionicity is paramount for twin pregnancy surveillance. A thin dividing amniotic membrane that inserts into the shared placenta at a perpendicular, characteristic "T" configuration…
Pseudosac refers to fluid or blood in endometrial cavity and is typically associated with ectopic pregnancies. A true gestational sac is located paracentrically within the decidua and features a…
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