Merck Manual

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Postinflammatory Hyperpigmentation
postinflammatory-hyperpigmentation-allergy-atopy-german-shepherd-dog-moriello-high
Postinflammatory Hyperpigmentation

    Note the hyperpigmentation in the inguinal region of this dog. This is postinflammatory inflammation due to allergic skin disease.

Courtesy of Dr. Karen Moriello.

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Acanthosis Nigricans