Computed tomography-assisted management of a mandibular dentigerous cyst in a dog with a nasal carcinoma.
METHODS
A 6-year-old neutered male Boston Terrier was examined to determine the cause of sneezing, bilateral nasal discharge, nasal congestion, lethargy, and coughing of 2 months' duration.


RESULTS
An undifferentiated nasal carcinoma was diagnosed. During computed tomography (CT) evaluation of response to tomotherapy radiation treatment, a mandibular dentigerous cyst, associated with an unerupted left mandibular first premolar, was monitored for expansion.


RESULTS
The dog had a profound response to radiation treatment, and the nasal carcinoma totally resolved. It was determined on the basis of CT that the rate of expansion of the dentigerous cyst was placing the dog at risk for mandibular fracture and loss of vitality to the surrounding teeth. The unerupted left mandibular first premolar and associated dentigerous cyst were surgically removed and submitted for histologic evaluation.


CONCLUSIONS
Images obtained during sequential CT evaluations performed after radiation treatment of nasal carcinoma should be examined for evidence of the primary neoplasm as well as to detect unrelated lesions of the orofacial region that can compromise the quality of life. Findings of CT evaluations can be used to determine when and how to initiate treatment for dentigerous cysts in regard to the patient's response to radiation treatment.
Soukup
Jason W
JW
Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706, USA.
Lawrence
Jessica A
JA
Pinkerton
Marie E
ME
Schwarz
Tobias
T
D000818:Animals; D002277:Carcinoma / Q000473:pathology / Q000662:veterinary*; D004285:Dogs; D007570:Jaw Cysts / Q000000981:diagnostic imaging / Q000662:veterinary*; D008297:Male; D009669:Nose Neoplasms / Q000473:pathology / Q000532:radiotherapy / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary*