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. Author manuscript; available in PMC: 2013 Apr 15.
Published in final edited form as: Cancer. 2011 Aug 31;118(8):2069–2077. doi: 10.1002/cncr.26425

Figure 4.

Figure 4

Criteria for intraglandular tumor spread (IGS) included (A) small tumor focus separated from the main tumor mass by a layer of benign thyroid parenchyma (arrow and inset), (B) isolated psammoma bodies in the thyroid stroma (arrow), or (C) tumor aggregates within the lymphatic channels(arrow).