A Pseudotumorous Nodular Lesion of the Subcutis in a Beagle Dog Comparable to Calcifying Fibrous Pseudotumor in Human

Abstract

A subcutaneous mass was found in a 15-month-old male beagle dog. It grew to 6 cm in diameter, and then reduced gradually to 4 cm. Histopathologically, the mass was well circumscribed but uncapsulated and comprised of hypocellular hyalinized fibrosclerotic tissue and a variable inflammatory infiltrate, which was composed chiefly of the lymphocyte. The characteristic findings of this nodular lesion were remarkably similar to those of calcifying fibrous pseudotumor (CFP) in human, but lacking in calcification in this case. To establish the disease entity for this kind of fibrous pseudotumor in dogs, additional case reports are required.