Figure 1. A: Head and neck CT scan showing a heterogeneous tumor with five centimeters in its greater diameter enhanced with contrast in the patient's right parotid region. B: optic microscope; H&E stained slide (magnification 100x). C: Immunohistochemistry assay with diffuse positive result for protein S-100 (magnification 200x). D: FISH test showing rearrangement in gene EWSR1 resulting from translocation t(12;22) (q13;12).