Tendovaginitis Musculus flexor hallucis longus

Pseudotumoural

soft tissue lesions of the foot and ankle: a pictorial review. Tenosynovitis of the flexor hallucis longus (FHL). Sagittal T1-WI (a) and long-axis T2-WI (b): there is marked effusion (short arrow) in the tendon sheath of the FHL (long arrow), of low SI on T1-WI and high SI on T2-WI