Merck Manual

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Keratin clump, cytology
Keratin clump, cytology

    This mass of keratin flakes has much overlap and little individual identity, which is a common finding on cytology. If there are many large clumps, this is likely to be a real change such as the content of a keratin-filled cystic lesion rather than contamination. Again, there are no nuclei.

Courtesy of Abbey Veterinary Services.

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