Mast cell tumor in the rostral upper lip, 10-year-old English Bulldog
Photograph of a mast cell tumor in the rostral upper lip of a 10-year-old English Bulldog. This dog's original mast cell tumor engulfed the upper incisors and canine teeth as well as the rostral lip with submandibular lymphadenopathy, precluding wide surgical excision.
Courtesy of Dr. Alice Villalobos.