Porocarcinoma

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  Highly celular smears.
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  Cells in background of necrotic debris.
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  Large cohesive aggregate of small cells.
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  Cellular smear showing that most of the cells are free.
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  Dispersed cells population of numerous small epithelial cells.
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  Highly cellular smear; mixture of cluster and dispersed cells
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  Cohesive cluster of cells closely resembling basaloid cells
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  Cells showing cytoplasmic keratinisation.
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  Cells with abundant cytoplasm.
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  Disorganised sheet of tumor cells with nuclear atypia.
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  Cells with prominente nucleoli
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  Small cells with a small amount of cytoplasm.
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  Rounded nuclei with prominent nucleoli.
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  Cells with abundant cytoplasm
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  Cells with nuclear atypia
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  Epithelia cells showing atypia.
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  Mitosis figure.
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  Thin-Prep Poroid cells.
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  Cuticular cells with moderate cytoplasm.
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  Cuticular cells with moderate cytoplasm.
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  Poroid cells
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  Dispersed cell with abundant pale cytoplasm
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  Cluster of cells with intercellular lumina
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  Cells forming intercellular lumena
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  Intracytoplasmatic lumena in cuticular cell.
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  Intracytoplasmatic lumena in cuticular cell.

The porocarcinoma was first described by Pinkus in 1963. Represents between 0.01 and 0.005% of skin tumors. It occurs in older people with a topographic distribution:

55% lower limb
Trunk 2%
Head 15%
Upper limbs 10%

The images correspond to the cytology of a woman of 83 years who have skin lesions in the molar region.