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(A) Clusters of atypical cells (Papanicolaou stain, x100). (B) Malignant cells with high nuclear-cytoplasmic ratio and hyperchromatic nuclei in a necrotic background (Papanicolaou stain, x400). (C) Malignant cells displaying nuclear molding (Papanicolaou stain, x400). (D) Occasional acinar arrangement (Papanicolaou stain, x400).
