| Top rated - SUSPICIOUS FOR MALIGNANCY |
Crowded sheet of atypical follicular cells associated with cystic contents. 
(55 votes)
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Few scattered plasmacytoid cells. (Histologic follow-up: Langerhans cell histiocytosis).
(50 votes)
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Surgical follow-up to the previous three images revealed a follicular variant of papillary carcinoma. Note the thick eosinophilic colloid within the follicles.
(53 votes)
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Large atypical cells with macronucleoli. (Histologic follow-up revealed a carcinoma with thymus-like differentiation [CASTLE]).
(50 votes)
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Numerous monomorphic lymphocytes.
(49 votes)
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The hyalinizing trabecular adenoma resembles papillary thyroid carcinoma. Note, however, that the elongated nuclei are almost spindle shaped and the cells are embedded within stroma (histologic section).
(52 votes)
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Follicular cells with elongated nuclei embedded in stroma. (Histologic follow-up revealed a hyalinizing trabecular adenoma.)
(46 votes)
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Sparsely cellular sample with epithelioid and fusiform cells.
(48 votes)
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Monolayered sheet of follicular cells with nuclear elongation, chromatin clearing and nuclear grooves
(48 votes)
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Polymorphous population of atypical lymphoid cells.
(45 votes)
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Follicular cells with elongated nuclei embedded in stroma. (Histologic follow-up revealed a hyalinizing trabecular adenoma.)
(48 votes)
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Monolayered sheet of follicular cells with oval nuclei, nuclear grooves and focal chromatin clearing.
(48 votes)
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