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Vet Pathol 41:698-700 (2004)
© 2004 American College of Veterinary Pathologists
BRIEF COMMUNICATIONS AND CASE REPORTS

An Oral Choristoma in a Foal Resembling Hairy Polyp in Humans

T. J. Steinbach, A. Reischauer, I. Kunkemöller and M. G. Mense

Abstract

A neonatal foal was presented with a 6.5-cm pedunculated mass arising from the upper deciduous incisors. The distal end was soft and covered by haired skin, whereas the proximal end was firm, covered with mucosal epithelium, and at the point of transection contained a fully developed tooth. Microscopically, the mass was covered by epidermis and mucosal epithelium and the remaining portion of the mass consisted of mature collagen, nonneoplastic fat and smooth muscle, and a single tooth within a bony socket. The mass is consistent with an oral choristoma and has features similar to those described for hairy polyp in humans.

Key words: Choristoma; foals; hairy polyp.

Request reprints from Dr. T. J. Steinbach, Department of Veterinary Pathology, Armed Forces Institute of Pathology, 14th Street, Alaska Avenue North West, Washington DC 20306-6000 (USA). E-mail: steinbacht{at}afip.osd.mil






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