11/11/2025
This image titled “Effective Evaluation of Mid Sagittal View of CRL” provides a structured checklist of 15 key anatomical landmarks and their associated abnormalities that can be evaluated in the mid-sagittal ultrasound view during early pregnancy (particularly during first-trimester screening).
Here’s a quick summary of what each numbered region evaluates:
1. Ossification: Cranial Bones – Check for acrania, exencephaly, or anencephaly.
2. Interhemispheric Falx – Absence suggests holoprosencephaly.
3. Nasal Bone – Used to assess for aneuploidies (e.g., Down syndrome).
4. Maxilla – Evaluate for cleft palate/cleft lip and hypo-mineralization.
5. Mandible – Look for micrognathia or retrognathia.
6. Mid Brain – Look for ONTDs (open neural tube defects), cephalocele, Dandy-Walker complex, and aneuploidy signs.
7. FMF Angle (Fronto-Maxillary Facial Angle) – Altered in ONTDs and aneuploidy.
8. Cord Insertion Site – Detect gastroschisis, omphalocele, body stalk anomaly, or OEIS complex.
9. Urinary Bladder – Assess for megacystis or bladder exstrophy.
10. Diaphragmatic Continuity – Disruption may indicate diaphragmatic hernia.
11. Spine – Check for open spina bifida, kyphosis/scoliosis, or poor ossification.
12. Nuchal Translucency – Increased thickness suggests aneuploidies, cardiac anomalies, or skeletal dysplasia.
13. Head and Abdomen Size Proportion – If the head is larger than the abdomen, consider triploidy.
14. Pelvic Lucency Sign – May indicate a**l atresia.
15. Scalp Lesions – Could represent cystic hygroma or other scalp abnormalities
