On an axial MRI through the ankle at the level of the tarsal tunnel, a structure is identified immediately posterior to the tibialis posterior tendon and anterior to the flexor hallucis longus tendon. It is MOST likely the:

• A Posterior tibial artery
• B Tibial nerve
• C Flexor digitorum longus tendon ✓
• D Peroneus longus tendon

Explanation

The mnemonic 'Tom, Dick, And Very Nervous Harry' gives the anterior-to-posterior order in the tarsal tunnel: Tibialis posterior, flexor Digitorum longus, posterior tibial Artery, tibial Nerve, flexor Hallucis longus. Between tibialis posterior and flexor hallucis longus lie the flexor digitorum longus, then the neurovascular bundle. The peroneus longus runs in the lateral compartment, not the tarsal tunnel.

Reference: Gray's Anatomy, 42nd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.