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Spindle cells with high cellularity, closely packed to loose clusters and dyscohesive cells (MGG, ×100); (a) Spindle cells displaying elongated to wavy nuclei with blunt to tapered ends (MGG, ×200); (b) Fascicles with parallel, side-by-side arrangements of nuclei with scant cytoplasm. Nuclear palisading is also observed (MGG, ×100); (c) Abundant extracellular stromal material (MGG, ×200); (d) (Inset: Spindle cells with bipolar cytoplasmic processes (MGG, ×400)
