Treatment of a mandibular bone cyst by use of a corticocancellous bone graft in a horse

This is the authors' abstract. We don't add key points for this paper.

A 1-year-old male Appaloosa horse was referred for evaluation of a mass on the right rostral hemimandible.The mass had been first detected 3 months earlier and had not increased in size.There was no history of trauma , although the swelling developed acutely.Discharge had not been noticed from the mass, and no abnormalities were noticed when the horse was eating.Three months before referral, aspiration of the mass had yielded sterile serosanguineous fluid .Treatment had consisted of topical administration of dimethyl sulfoxide, with no apparent response to treatment.On referral , the horse had a 3-cm diameter firm mass with a 3-cm ventrolateral expansion on the right hemimandible at the interdental space.Palpation of the mass did not elicit signs of pain.Oral examination revealed no abnormalities of the buccal surface of the right hemimandible over the mass.All other physical examination findings were within normal limits, as were the results of a CBC.Lateral, oblique, and ventrodorsal radiography of the mandible revealed an expansile cavitary lytiC lesion located primarily in the right hemimandible, with some extension into the left hemimandible.The cystic lesion was located in the interdental space and extended from the roots of the mandibular incisor teeth to the right mandibular second premolar.The lesion had a thin mineralized capsule and was divided by multiple thin mineralized septae (Fig 1).Aspiration of the mass yielded serous exudate; a specimen was submitted for aerobic and anaerobic bacterial culturing and cytologic analysis.Results of both cultures were negative , and cytologic analysis revealed no indication of infection or neo-plaSia; only small numbers of lymphocytes, neutrophils, and RBC were seen.