Pseudoankylosis of the temporomandibular joint is infrequent in veterinary practice and mostly seen secondary to trauma. This case report describes the surgical treatment of a 1-year old, male, entire lurcher that presented with progressive lateral deviation of the muzzle to the left and decreased vertical mandibular range of motion of 6-month duration. There was no history of trauma, no pain on palpation and complete loss of temporomandibular joint movement, even under sedation. Computed tomography investigation showed a left-sided temporomandibular pseudoankylosis with osseous fusion between the zygomatic arch and mandible. Surgical excision of the ankylosed bone was performed and achieved an initial 5 cm interincisal gap. The surgical site healed, with no complications reported. Re-examination at 4 weeks revealed good vertical mandibular range of motion with interincisal gap of approximately 5 cm. At 9 months post-operatively, the dog had maintained good vertical mandibular range of motion and was able to eat normally, pant and hold large toys.
A 400 kg, male, adult cob pony presented with a history of stallion‐like behaviour without testicles palpable. The blood oestrone sulphate level was 4.90 ng/ml, consistent with cryptorchidism (0.1–10.0 ng/ml; IDEXX). Age was estimated at 8 years by dentition. Previous veterinary treatment history was unavailable. Examination under general anaesthesia found no evidence of prior surgical castration. Investigation of the inguinal region was unremarkable with no evidence of an inguinal extension of the gubernaculum testis or vaginal process on either side. Exploratory laparotomy of the right abdomen revealed a cystic, 5 × 8 cm mass with homogenous tapering stalk. This was removed by emasculation. Histological examination identified the mass as a benign testicular teratoma. Blood anti‐Mullerian hormone 5 days after the surgery measured 0.9 ng/ml. The pony made a full recovery and the owner reported the behavioural issues have resolved.
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