Case Report

Diagnosing Snapping Sartorius Tendon Secondary to a Meniscal Cyst Using Dynamic Ultrasound Avoids Incorrect Surgical Procedure

Figure 2

A series of dynamic ultrasound images taken in knee flexion/extension cycle, showing position of distal sartorius musculotendinous junction passing over parameniscal cyst; a palpable “snapping sensation” was felt through the transducer: (a) neutral extension; (b) in semiflexion; (c) extension with active quadriceps contraction; note that the tendon of sartorius passes forwards.