PMC4158621_01
Fine-needle aspiration cytology smear demonstrating a monomorphic population of cells with eosinophilic cytoplasm arranged in papillary groups (Papanicolaou, x40)
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F1
The FNA specimen showed a monomorphic population of lesional cells arranged in papillary groups with transgressing vessels [Figure 1].
Fine-needle aspiration cytology smear demonstrating lesional cells with round nuclei, prominent nucleoli and foamy cytoplasm (Papanicolaou, x60, inset, x100)
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F2
The lesional cells demonstrated round nuclei, prominent nucleoli and foamy cytoplasm [Figure 2].
Histologically, the tumor is a circumscribed, unencapsulated lobulated mass with microcystic and tubular structures (H and E, x2.5)
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F3
The histological examination displayed a circumscribed, unencapsulated lobulated mass with microcystic and tubular structures [Figure 3].
Histologically, the microcystic structures contain bubbly, eosinophilic secretions; the tumor cells have pale eosinophilic granular cytoplasm and low grade nuclei with distinct nucleoli (H and E, x40)
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F4
The tumor cells had pale eosinophilic granular cytoplasm and low grade nuclei with distinct nucleoli [Figure 4].