RMSKS Sonography Exam Prep Exam Questions & Answers 2026 (21–30)

Question 1

In ankle ultrasound, which normal anatomical structure appears as an anisotropic, fibrillar, hyperechoic band extending from the calcaneus to the plantar aspect of the foot?

TheoryPractice · Accepted Answer

Plantar fascia. The plantar fascia appears as an anisotropic, fibrillar, hyperechoic band extending from the calcaneus to the plantar aspect of the foot. It's typically 2-4 mm thick at its calcaneal attachment.

Question 2

What is the name of the normal hypoechoic structure that separates the quadriceps tendon from the prefemoral fat when imaging the knee?

TheoryPractice · Accepted Answer

Suprapatellar bursa. The suprapatellar bursa is a normal hypoechoic structure that separates the quadriceps tendon from the prefemoral fat when imaging the knee. A small amount of fluid in this bursa is considered normal.

Question 3

Which of the following muscles forms the lateral border of the rotator interval in the shoulder?

TheoryPractice · Accepted Answer

Supraspinatus. The supraspinatus muscle forms the lateral border of the rotator interval in the shoulder. The rotator interval is bounded medially by the subscapularis tendon and laterally by the supraspinatus tendon.

Question 4

When performing an ultrasound of the hip in adults, which structure should be identified as a hypoechoic triangular structure deep to the iliopsoas muscle?

TheoryPractice · Accepted Answer

Hip joint capsule. The hip joint capsule appears as a hypoechoic triangular structure deep to the iliopsoas muscle during ultrasound examination of the hip in adults. This is an important landmark when evaluating for joint effusion.

Question 5

In pediatric patients, which anatomical feature distinguishes their musculoskeletal ultrasound appearance from adults?

TheoryPractice · Accepted Answer

Prominent growth plates. Prominent growth plates are a distinguishing feature in pediatric musculoskeletal ultrasound. They appear as hypoechoic bands at the ends of long bones and should not be mistaken for fractures or other pathologies.

Question 6

When imaging the ulnar nerve at the elbow, through which anatomical structure does the nerve normally pass?

TheoryPractice · Accepted Answer

Cubital tunnel. The ulnar nerve normally passes through the cubital tunnel at the elbow. This is an important anatomical relationship to understand when performing ultrasound of this region to evaluate for nerve compression or subluxation.

Question 7

Which structure appears as a thin hyperechoic line covering the femoral head during hip ultrasound?

TheoryPractice · Accepted Answer

Articular cartilage. The articular cartilage of the femoral head appears as a thin hyperechoic line covering the femoral head during hip ultrasound. This is an important structure to evaluate, especially in pediatric patients.

Question 8

In the wrist, which of the following structures appears as an anechoic band-like structure overlying the flexor tendons on ultrasound?

TheoryPractice · Accepted Answer

Flexor retinaculum. The flexor retinaculum appears as an anechoic band-like structure overlying the flexor tendons on ultrasound of the wrist. It forms the roof of the carpal tunnel and is an important landmark when evaluating this region.

Question 9

Which muscles form the rotator cuff of the shoulder?

TheoryPractice · Accepted Answer

Supraspinatus, infraspinatus, teres minor, and subscapularis. The rotator cuff of the shoulder is formed by four muscles: supraspinatus, infraspinatus, teres minor, and subscapularis (often remembered by the acronym SITS). These muscles are essential for shoulder stability and are commonly evaluated with ultrasound.

Question 10

When imaging the anterior knee, what is the normal sonographic appearance of the quadriceps tendon?

TheoryPractice · Accepted Answer

Hyperechoic, fibrillar structure with a multilayered appearance. The normal quadriceps tendon appears as a hyperechoic, fibrillar structure with a multilayered appearance on ultrasound. It represents the conjoined tendon of the four components of the quadriceps muscle.

RMSKS Sonography Exam Prep Exam Questions & Answers 2026 (21–30)

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