Atypical eosinophilic granuloma in a dog. Case report

The eosinophilic granuloma is characterized by dense cellular infiltration of eosinophils, macrophages, and mast cells, in addition to collagenolysis foci. Canine eosinophilic granuloma is a rare inflammatory skin disease that affects the oral mucosa. However, the cutaneous form is more evident and can be in the scrotum, testicles, perineum, and flanks. The etiology of eosinophilic granuloma in dogs is not clear but allergic processes can originate granulomatous nodules or plaques. Affected dogs may experience itching, swelling, and, occasionally, pain. The histopathological analysis is necessary for definitive diagnosis. The present case report described a 12-year-old male dog, Poodle, with a history of swelling, itching, and pain in the scrotum. Complete clinical staging was performed through blood count, biochemistry analysis, thoracic radiographs, abdominal ultrasound, and electrocardiogram. The dog was submitted to surgical removal followed by histopathologic evaluation. Eosinophilic granuloma should be included in the differential diagnosis of solitary masses in the scrotal region.