Table 1.

Pearls of Arthroscopic Synovectomy for Zone 2 FHL Tenosynovitis

Both preoperative clinical examination and MRI are important for making the diagnosis.

The instruments should be on the lateral side of the FHL tendon during debridement of zone 1 of the FHL tendon.

No debridement should be performed at the fascial layer deep to the flexor digitorum brevis muscle.

Debridement at the zone 2A FHL tendon sheath is safe because the medial plantar nerve is protected by the fibrous tendon sheath.

FHL, flexor hallucis longus; MRI, magnetic resonance imaging.