A 10‐month‐old, male entire Rhodesian Ridgeback was presented with a 1‐week history of vomiting, small and large intestinal diarrhoea, hyporexia and weight loss. Physical examination revealed a palpable abdominal mass. Abdominal ultrasonography and contrast computed tomography demonstrated multiple cystic masses of varied size and wall thickness with no appreciable origin. An exploratory laparotomy revealed multiple mass lesions throughout the mesentery, located adjacent to blood vessels and varying in size from approximately 2 mm up to 13 cm in diameter. In histologic sections, the nodular structures resembled thick‐walled arteries. Immunohistochemistry confirmed positive cytoplasmic immunoreactivity for von Willebrand factor, CD31 and smooth muscle actin. This is, to the authors’ knowledge, the first case of disseminated peritoneal angiomatosis with arterial differentiation in the dog. The dog was euthanased due to the progressive nature of the mass lesions.
This report documents the first case of gossypiboma (textiloma) identified within the thorax of a dog. CT findings, surgical removal and histopathology are described. Intra‐thoracic gossypiboma has not previously been reported in dogs and is rarely reported in the human medical literature, where it is most commonly associated with previous cardiac or pulmonary surgery. This dog had previously had a thoracotomy for attempted surgical correction of a persistent right aortic arch and left ligamentum arteriosum 6 years prior to presentation. A brief review of the previous literature and recommendations for prevention of this condition are provided.
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