Figure 1: Direct smear of an aspirate from an axillary mass in an alpaca

 

The smears contained sheets of dark blue anucleated keratinized squamous cells, many of which had central clearing in the location of the nucleus (arrowheads), so-called ‘ghost’ or ‘shadow’ cells. These cells usually arise from the matrical bulb of the hair follicle, indicating the mass originates from a hair follicle. There were also multinucleated giant cells (arrow) (modified Wright’s stain, scale bar = 25 um)

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