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October 2010

Dog, third phalanx, subungual epithelial inclusion cyst.

Detailed information

Diagnosis: dog, third phalanx, subungual epithelial inclusion cyst

Animal: Tibetan terrier, 10 years, male

Organ: Third phalanx

History: A distal extremity of the dog was submitted without case history.

Macroscopical findings: The dactyl was enlarged and laterally flattened. Within the third phalanx the bone was replaced by a cystic cavity.

Histopathological findings: Within the third phalanx an expansive cystic cavity was found, which replaced the bony tissue. The cystic cavity was lined by a well differentiated keratinizing multilayered epithelium with pyogranulomatous inflammation in the adjacent tissue.

Diagnosis: dog, third phalanx, subungual epithelial inclusion cyst

Investigation and photo by: Vanessa Herder, Andreas Beineke, Department of Pathology, University of Veterinary Medicine Hannover Foundation, Germany