Clinical History
62 year old male with incidental finding of a soft tissue mass within the posterior left knee on ultrasound for Baker’s cyst.
Ultrasound of the Month – Case 162
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Diagnosis: Tensor Fascia Suralis Muscle
The tensor fascia suralis is a rare accessory muscle of the knee. This muscle most commonly originates from the distal semitendinosus but can arise from any hamstring muscle and can insert into the medial gastrocnemius, posterior leg fascia, or Achilles.
Sonographic imaging of non-pathologic accessory muscles demonstrates echotexture identical to that of other normal muscles. This is important to recognize such that variant muscle anatomy is not mistaken for neoplasm.
Ultrasound of the Month – Case 162
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