SDMS CME Credit – Cerebellar Diameter as a Predictor of Gestational Age of Fetus: Comparison With Other Biometry Parameters

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Authors: Muhammad Uzair, MS, Syed Muhammad Yousaf Farooq, PhD, Muhammad Faisal Nazir, BS, Mehreen Fatima, PhD, Syed Amir Gilani, PhD, Sajid Hameed, PhD, Khalida Bibi, BS, Tehreem Fatima, BS, Zohaib Shafiq, BS, Rafia Shoaib, BS, Tayyaba Saeed, BS, and Kainat Bibi, BS

Category: OB/GYN [OB]

Credit: 0.75 SDMS CME Credit

Objectives: After studying the article, you should be able to:

• • Discuss the role of transcerebellar diameter (TCD) in estimating fetal gestational age (GA) and compare its accuracy with other biometric parameters.

• • Explain the advantages of TCD in assessing GA and its reliability in cases of intrauterine growth restriction (IUGR).

• • Summarize the methodology and statistical findings that validate TCD as a reliable sonographic measurement for GA estimation.

1. What is the gold standard for calculating gestational age (GA) in the first trimester?

2. B. Transcerebellar diameter (TCD)

3. C. Biparietal diameter (BPD)

4. D. Femur length (FL)

Head circumference (HC), BPD, and abdominal circumference (AC) can vary up to how many weeks from GA in the second and third trimesters?

A. Two

B. Three

C. Four

D. Five

Which fetal abnormality can potentially be predicted using the ratio of TCD to AC?

A. Skeletal dysplasia

B. Ventricular septal defect

C. Intrauterine growth restriction (IUGR)

D. Hydrocephalus

According to the article, what is the highest reported TCD value to date?

A. 30.5 mm

B. 38.2 mm

C. 43.6 mm

D. 48.4 mm

According to Table 1, which of the following biometric measurements had the least amount of standard deviation?

A. TCD-GA

B. BPD-GA

C. AC-GA

D. FL-GA

According to Table 1, which of the following biometric measurements had the greatest amount of standard deviation?

A. AC-GA

B. BPD-GA

C. FL-GA

D. TCD-GA

According to the article, how was the BPD measured during the sonographic examination?

A. Inner to inner border

B. Outer to outer border

C. Outer to inner border

D. Inner to outer border