Papillary carcinomas - Figure 18. Differential diagnostics: Hashimoto's thyroiditis.

The positive predictive value of grooves and inclusions is much less in the case of oxyphilic cells. Therefore the diagnosis of a papillary carcinoma requires other cytological signs.
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Chronic lymphocytic thyroiditis- case 55

Coexistent Hashimoto's thyroiditis and papillary carcinoma - case 52


The cytological presentation was more than suspicious for a papillary carcinoma, while histopathology disclosed Hashimoto's thyroiditis without any nodules.


Our diagnosis was suspicion of papillary carcinoma.

Chronic lymphocytic thyroiditis- case 25

Coexistent Hashimoto's thyroiditis and papillary carcinoma - case 60


The presence of irregular clusters with nuclear crowding and inclusion and peripheral condensation of chromatine raise the possibility of a papillary carcinoma.

We had to raise the possibility of papillary carcinoma on the presence of inclusions.

Chronic lymphocytic thyroiditis- case 20

Oxyphilic variant of papillary carcinoma - case 70


Although the presence of grooves is not a reassuring phenomenon, the lack of tendency of cells to dissociate stands against the possibility of a tumor.


The tendency of cells to dissociate is the most important sign favouring a tumor.