FRCR Anatomy Mock 3 — Questions and Answers
Question 1: On axial CT of the chest, the azygos vein arches over which structure to drain into the superior vena cava?
- Right main bronchus (Correct answer)
- Left main bronchus
- Trachea
- Right pulmonary artery
Correct answer: Right main bronchus
The azygos vein arches anteriorly over the right main bronchus at the level of T4–T5 to drain into the posterior aspect of the superior vena cava.
Question 2: Which muscle forms the medial wall of the femoral triangle?
- Adductor longus (Correct answer)
- Pectineus
- Iliopsoas
- Gracilis
Correct answer: Adductor longus
The femoral triangle is bounded laterally by the sartorius, medially by the adductor longus, and superiorly by the inguinal ligament.
Question 3: The hepatic veins drain into the IVC at which level?
- T8 (Correct answer)
- T10
- T12
- L1
Correct answer: T8
The three hepatic veins drain into the IVC at the T8 level, just below the diaphragm, and this confluence is visible on axial cross-sectional imaging.
Question 4: On MRI of the shoulder, which rotator cuff tendon passes under the coracoacromial arch and is most commonly torn?
- Supraspinatus (Correct answer)
- Infraspinatus
- Subscapularis
- Teres minor
Correct answer: Supraspinatus
The supraspinatus tendon passes under the coracoacromial arch in the subacromial space and accounts for approximately 95% of rotator cuff tears.
Question 5: Which structure forms the posterior boundary of the epiploic foramen (foramen of Winslow)?
- Inferior vena cava (Correct answer)
- Aorta
- Portal vein
- Common bile duct
Correct answer: Inferior vena cava
The epiploic foramen is bounded anteriorly by the hepatoduodenal ligament, posteriorly by the IVC, superiorly by the caudate lobe, and inferiorly by the first part of the duodenum.
Question 6: On a sagittal MRI of the spine, the posterior longitudinal ligament (PLL) is narrowest at which level?
- Lumbar spine (Correct answer)
- Cervical spine
- Thoracic spine
- Sacral spine
Correct answer: Lumbar spine
The PLL is broad in the cervical region but narrows to approximately half its width at the lumbar level, contributing to the higher incidence of posterolateral disc herniations in the lumbar spine.
Question 7: On axial brain MRI, the posterior limb of the internal capsule carries which major tract?
- Corticospinal tract (Correct answer)
- Corticobulbar tract
- Thalamocortical sensory fibres
- Optic radiation
Correct answer: Corticospinal tract
The corticospinal (pyramidal) tract passes through the posterior limb of the internal capsule, making this region critical in assessment of stroke and upper motor neuron lesions.
FRCR Anatomy Mock 3
On axial CT of the chest, the azygos vein arches over which structure to drain into the superior vena cava?