... of Schwan-noma: the picture shows an increased cross sectional area of median nerve at palmFigure 1Schwannoma of median nerve at palm: A case of Schwannoma: the picture shows an increased cross ... Sullivan P, Lomas F: Sonography in the diagnosis of car-pal tunnel syndrome. AJR Am J Roentgenol 1999, 173:68 1-6 84.6. Padua L, Aprile I, Pazzaglia C, Frasca G, Caliandro P, Tonali P, Marti-noli ... think that, being US an inexpensive and easilyavailable method which also provides a dynamic exami-nation, it may be the first-line approach to the nerve. The cost-benefit ratio is in favour of...