PMC3342024_01
Axial CT-scan shows a retroperitoneal mass (60 x 60 x 80 mm), solid, placed in left paravertebral region, level L3-L4, on the left side of aorta, ilio-psoas muscle adherent.
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The bowel was dislocated without signs of intestinal occlusion (Fig. 1).
Immunohistochemically, the tumor cells test strongly positive for c-kit (x200).
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Immunohistochemistry showed positivity for KIT (CD 117) (Fig. 2), focal positivity for S-100 protein and NSE (neuron specific enolase), negativity for CD34, smooth and skeletal muscle actine.