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Epitheliotropic cutaneous lymphosarcoma (mycosis fungoides), 8-yr-old male Pit Bull

Courtesy of Dr. Alice Villalobos.

Infiltration by malignant lymphocytes caused a firm swelling of the lips and adnexa on the left side of this dog's face, causing salivation, odor, and discomfort. This case was aggressive, fulminant, and resistant to treatment.