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DIFFERENTIAL DIAGNOSIS
Papillary-cystic and follicular type
Cystadenocarcinoma (lack of microcycstic and vacuolated cells)
Mucoepidermoid carcinoma (presence of mucous cells)
Metastatic thyroid carcinoma (presence of thyroglobulin)
Polmorphous low-grade adencarcinoma (perineural invasion, homogeneous cell population, single cell infiltration at the periphery)
Clear cell type
Clear cell carcinoma (lack of glycogen, lack of serous differentiation)
Epithelial-myoepithelial carcinoma (lack of glycogen)
Squamous cell carcinoma (lack of glycogen)
Metastatic renal cell carcinoma (lack of glycogen)
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Slide 98
