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Pathological phenomena. Histology shows solid areas with poorly cohesive cells forming cuff around blood vessels resulting in a pseudopapillary architecture. Tumor cells show uniform nuclei with finely textured chromatin, inconspicuous nucleoli and occasional longitudinal grooves. A: × 20 magnification; B: × 40 magnification; C: CD 10 positive; D: CD 56 positive; E: Vimentin positive.
