Merck Manual

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Multifocal histiocytic nodules of the dermis and subcutaneous tissues, dog
Multifocal histiocytic nodules of the dermis and subcutaneous tissues, dog

These lesions responded to treatment transiently, but a large mass developed in the retropharyngeal area of this 6-yr-old Boxer 1 mo later.

Courtesy of Dr. Alice Villalobos.