Introduction : The dentigerous cyst is a well-known congenital malformation usually found in the temporal region. This is the first case report of a large maxillary sinus cyst with ectopic teeth in an adult horse. Methods: A 14-year-old warmblood gelding was presented for evaluation of chronic right nasal discharge. After imaging exploration, surgery was performed on the standing horse with a conchofrontal sinus trephination and a large maxillary bone (MB) sinutomy. Results : The examinations revealed a sinusal mass in the right maxillary sinus covered by sinusal mucosa and around the infraorbital canal. The mass contained three ectopic tooth structures. The dental table was complete and normal. Both approaches (right frontal trephination, and maxillary sinutomy) showed adhesion between the dental structures, the infraorbital canal and the MB. The two simultaneous approaches allowed extraction with preservation of all sinus and nerve structures. Conclusions: The loss of integrity in the MB and the attachment to the infraorbital canal suggests that there could have been subsequent damage to the infraorbital canal, seen at the time of the examination and the surgery, leading to neurological symptoms in the future. The extraction of these completed structures in the standing horse has not been described and the use of both approaches allowed good visualization and preservation of the integrity of the sinus structures whilst allowing complete removal of the mass.

A wound in the distal part of the horse’s limb with involvement of the foot can lead to large impacts in life prognosis and, depending on the severity of the lesion, may render successful recovery of the horse difficult or even questionable. Due to that fact and the high frequency of complications associated with wounds in the foot, the approach and management is not always straightforward, nor easy. In this case report a 9-year-old mare is presented with a chronic wound in the inner surface of foot of the right hind limb. The wound involves the medial coronary band with its proximal displacement and an inadequate push of horny tissue. For treatment, a surgical approach was chosen with application of a uniaxial traction device between the coronary band and the hoofwall in order to direct and adapt as much as possible the growth direction of coronary papillae after resection of the scar tissue. The aim of this approach was to reduce, firstly the defect in the proximal hoof wall, and secondly, the deviated growth of the hoof wall. 15 days after surgery and a resin casting, an orthopaedic shoe (three-quarter bar shoe) was placed to stabilize the hoof and eliminate weight bearing on that portion of the hoof wall This additional management changed the deviation from a 135° to a completely parallel growth, with complete healing of the tissue. This case example demonstrates the importance of working together between the farrier and the veterinarian to improve the aspect and functionality of the hoof.