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. 2014 May 30;29(6):818–824. doi: 10.3346/jkms.2014.29.6.818

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© 2014 The Korean Academy of Medical Sciences.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2 — The histology shows the primary foci and cytological features of matched thyroid lesions (A-C, Case 2; D-F, Case 11; G-I, Case 13). (A) Tumor nests of a well-differentiated squamous cell carcinoma are observed in a specimen of right bronchus. (B, C) Thyroid cytology of Case 2 reveals a slight inflammatory background, and two populations of epithelial cells: follicular epithelial cells and tumor cells. Dyskeratotic cells are also observed in the tumor clusters. (D) A moderately differentiated adenocarcinoma is seen, with frequent mitotic figures. (E, F) The cytology of Case 11 shows a colloid background and heterogeneous population. (G) A poorly differentiated adenocarcinoma is seen. (H, I) Smear of the thyroid aspirate shows large hyperchromatic atypical cells with occasional intracytoplasmic vacuoles. (A, D, G, hematoxylin and eosin, ×400; B, C, E, F, H, I, Papanicolaou stain, ×400).