Fig. 3From: Diagnostic potential of ultrasound in carpal tunnel syndrome with different etiologies: correlation of sonographic median nerve measures with electrodiagnostic severityTransverse US image of right median nerve (outlined) at level of carpal tunnel (A) with CSAd is 12.4 mm2 and level of pronator quadratus muscle(B) with CSAp is 6.8 mm2 in a patient with idiopathic CTSBack to article page