Although it is considered that tibial cranial drawer signs (TCDS) do not disappear with tibial plateau leveling osteotomy (TPLO), in some cases, this may occur and is presumed to be due to periarticular fibrosis; however to our knowledge, no reports have confirmed the disappearance of TCDS after TPLO. Here, we aimed to identify factors influencing the presence/absence of TCDS after TPLO. Thirty-five canine stifle joints requiring TPLO for cranial cruciate ligament rupture were assessed preoperatively, immediately postoperatively, and each month for 3 months following surgery. The cases were classified as those in which TCDS disappeared (13 stifles, disappeared group) and those in which TCDS remained (22 stifles, residual group). The osteoarthritis (OA) score at each postoperative time point was subtracted from the preoperative OA score (variation in OA score). There were no differences between the two groups, except in the preoperative OA scores (which were higher in the disappeared group). Significant increases in the variations in OA score were observed over time in both groups; these variations were significantly higher in the disappeared than in the residual group at 1, 2, and 3 months postoperatively. Disappearance of TCDS after TPLO is associated with a higher degree of OA progression, suggesting involvement of OA progression factors and periarticular fibrosis.

Two kittens with cranial growth plate fractures of the seventh cervical vertebra were treated with a ventral median cervical approach to repair the fracture and fixed using titanium screws and polymethylmethacrylate. In both cases, postoperatively osteophyte formation progressed gradually in the ventral part of the fifth cervical vertebra, and in one case, deformity was observed in the thoracic cage and thoracic cranial region. Although the etiology of the fractures is unknown, no implant failure or loosening was observed after surgery, the clinical symptoms improved, and these kittens were able to walk, suggesting that the technique described in this study may be an effective treatment option.

A 12-year-old mix-breed dog was presented with anal sac tumor and scheduled for left anal sacculectomy. Pre-operative echocardiography revealed that the dog had moderate aortic regurgitation (AR), mild mitral valve regurgitation, and dynamic left ventricular outflow tract obstruction. A hypotension of invasive arterial blood pressure (IABP) following low mean and diastolic blood pressure during surgery was suspected to be related to AR and treated by heart rate titration with atropine and dopamine infusion. Accurate blood pressure assessment with IABP and extrapolation treatment strategy of hypotension related to AR by human medicine are useful for anesthetic management in dogs with AR.