Tooth elongation of incisors and/or molars were found in 39 of 212 rabbits visited as clinical patients for 6 years in 1996-2001. The molar elongation with or without enamel spikes was observed in 24 of 39 rabbits. The rabbits with molar elongation showed non-specific clinical symptoms, such anorexia, reduction of feces, soft feces and reluctant to eat hard foods. As it is difficult to diagnose the molar elongation from the clinical symptom, oral examination should be required as a general physical examination. The prognosis was varied after the treatments of coronal reduction or odontoplasty. It is important to educate the owners that tooth elongation of rabbits often recurs after the treatments. Careful observation also needs to maintain the functional occlusion.
In a ten-year-old cat with hyperthyroidism, findings obtained from urine an blood tests showed that it was suffering from fanconisyndrome-like disease. Fanconi syndrome features proximal renal tubular disorder. The results of these tests revealed glucosuria without hyperglycemia, increased excretion rates of urinary fractions of phosphorus and potassium with decreased concentrations of serum phosphorus and potassium. Also detected was increased urinary excretion of protein, the main of which was proved to be the loss of α1 and α2 globulin. Then the cat was treated with anti-thyroid agent, thiamazole. Body weight, urinary NAG index, excretion of potassium, and urinary protein changed as the concentrations of serum T4 fraction changed. Now the cat is in good condition with administration of thiamazole.
A 19-month-old female Jomon-shiba dog with the main complaint of cardiac murmur was diagnosed by echocardiography and cardiac catheterization as having a membranous ventricular septal defect with second-degree AV block. It was also confirmed that the dog was suffering from consequent overload of blood flow in the left ventricle. Therefore, open heart surgery was performed with mildly hypothermic extracorporal circulation to correct the septal defect. Postoperative auscultation did not show any detectable murmur, and echocardiography showed that overload of blood flow in the left heart had diminished. The dog recovered without any complications, and has been doing well since the surgery. Second-degree AV block was found to have disappeared completely five months after surgery. It is probable that the improvement of the left ventricular blood flow caused the disappearance of the second-degree AV block.
A four-year-old spayed mixed-breed cat was referred for dyspnea and edema. A right atrial thrombosis was detected by echocardiography. Blood and urine analyses revealed hypoalbuminemia and severe proteinuria. A blood coagulation test showed a decrease in AT (antithrombin) III activity. The patient died four days after admission to the hospital. Histopathological examination revealed endocarditis, membranous glomerulonephritis and thrombosis in the pulmonary arteries as well as in the right atrium. On the basis of these findings, proteinlosing nephropathy might have been the cause of the formation of the right atrial thrombosis.