RESUMO
An eight-year old Rottweiler dog was presented with signs of enophthalmia, ptosis, anisocoria and mydriasis of the right eye, which showed visual disturbance, reduced or absent reflexes, and ophthalmoplegia. Consensual pupillary light reflex was also absent in the left eye. These neurological deficits were compatible with cavernous sinus syndrome. Computed tomography images of the cavernous sinus and the optical fissure revealed a mildly calcified mass arising from the right presphenoid bone extending further caudally into the orbital foramina. This extension of the mass affected the normal function of several cranial nerves. The dog was euthanased within one year of the initial presentation following development of forebrain signs. A chondrosarcoma was diagnosed histologically after necropsy.
Assuntos
Condrossarcoma/veterinária , Doenças do Cão/diagnóstico , Neoplasias Oculares/veterinária , Animais , Seio Cavernoso/patologia , Condrossarcoma/diagnóstico , Condrossarcoma/patologia , Doenças do Cão/patologia , Cães , Neoplasias Oculares/diagnóstico , Neoplasias Oculares/patologia , Evolução Fatal , Feminino , Tomografia Computadorizada por Raios X/veterináriaRESUMO
The radiologic anatomy of the aortic bifurcation in the rabbit has received little study but it is important as this anatomical area is widely used in atherosclerosis research. Thirty rabbits were used to study the aortic bifurcation and subsequent branching patterns on arteriography. Fifteen different arteries were identified. Mean arterial diameters of 2.88 ± 0.7 and 2.27 ± 0.55 mm were obtained for the aorta and external iliac arteries, respectively. The cranial and middle aspects at the seventh lumbar vertebra (L7) were the most frequent anatomical landmarks (53.3% of the cases) for aortic and common iliac bifurcations, respectively. The caudal aspect of L6 was the most frequent origin (50% of the cases) for the median sacral artery. Deep circumflex iliac arteries originated from common iliac arteries and not the abdominal aorta in the rabbit, showing anatomical asymmetry in 73.3% of the cases. No gender disparity was found in the anatomical location of any of the arteries of the study. Knowledge of normal vascular landmarks for the aortic bifurcation as well as anatomical variations should be helpful to future experimental studies.
Assuntos
Angiografia/métodos , Aorta Abdominal/anormalidades , Aorta Abdominal/anatomia & histologia , Artéria Ilíaca/anormalidades , Artéria Ilíaca/anatomia & histologia , Animais , Aorta Abdominal/diagnóstico por imagem , Feminino , Artéria Ilíaca/diagnóstico por imagem , Masculino , CoelhosRESUMO
The head of a newborn dolphin (Tursiops truncatus), that died shortly after birth was imaged using computed tomography (CT). Gross cross-sectional slices of the head were compared with the CT images to identify normal structures of the cranium, brain, and respiratory and digestive pathways. Labelled transverse CT images of the dolphin head are presented sequentially as a reference for normal anatomy.