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Figure 1: (a) CT Scan thorax showing posterior mediastinal mass. (b) Fasciculated spindle-cell tumor with hyper and hypocellular areas (×100 H and E). (c) Hypercellular area with spindle-shaped tumor cells exhibiting serpentine to plump hyperchromatic mitotically active nuclei and ill-defined acidophilic cytoplasm (×400 H and E). (d) Tumor cells showing positivity for S-100 (×400)

Figure 1: (a) CT Scan thorax showing posterior mediastinal mass. (b) Fasciculated spindle-cell tumor with hyper and hypocellular areas (×100 H and E). (c) Hypercellular area with spindle-shaped tumor cells exhibiting serpentine to plump hyperchromatic mitotically active nuclei and ill-defined acidophilic cytoplasm (×400 H and E). (d) Tumor cells showing positivity for S-100 (×400)