Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
The patient was a yearling quarter horse gelding, presented with a soft tissue swelling and discharging sinus on the ventro-lateral border of the right mandible. The swelling had first appeared six weeks previously, and the sinus had been discharging for the last 5 weeks.
Dixon, Richard T.
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 33
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss1/13