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Pathologic specimens of the left hand mass images demonstrating A fragments of soft tissue admixed with bone and cartilage consistent with poorly differentiated carcinoma (Hematoxylin-eosin stain; magnification ×2,) B infiltrative malignant cells arranged in nests, glands, and single cells (Hematoxylin-eosin stain; magnification ×4,) and C marked nuclear atypia and fibrous background (Hematoxylin-eosin stain; magnification ×40).
