
04/03/2025
The photos shown are from an 18 month old Quarter horse gelding. This horse presented to his primary care veterinarian for a firm left sided facial swelling. Within two months the swelling had doubled in size, at which point he was referred to NEVDS. During his oral exam, Dr. Limone discovered that his first lower right premolar was abnormal. Radiographs revealed that the deciduous (baby) tooth was present, but where there should have been a tooth bud for a developing adult tooth, there was an abnormal area displacing the mandibular cortical bone.
A plan for extraction and biopsy was made. The tooth was extracted without incident and the abnormal tissue was submitted for evaluation. Evaluation of the biopsy revealed an ameloblasoma - a type of oral tumor. This form of neoplasia can grow rapidly and damage nearby tissues, such as bone. Fortunately, this type of tumor has a low rate of metastasis.
This horse will have an oral exam every 6 months moving forward to ensure recurrence is identified quickly if it occurs. This case demonstrates the importance of oral exams in young horses even if they’ve never seen a bit. There are a lot of things that can go wrong in a young horse’s mouth!! Luckily this guy had an astute owner and primary care veterinarian who took quick and decisive steps to get him treatment. Everyone here at NEVDS is keeping fingers crossed that another surgery isn’t needed for our young friend. 🤞🤞🤞