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At low magnification, the PTC, which has a predominantly follicular pattern, is separated from the non-neoplastic thyroid by a fibrous capsule. The high-magnification inset demonstrates the classic nuclear features of PTC including crowding and overlapping, pale chromatin, nuclear grooves, and a pseudoinclusion (hematoxylin and eosin; original magnifications: 40 × ; inset 400 × ). PTC, papillary thyroid carcinoma.
