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case_images: Right lateral thoracic radiograph depicting normal thorax at initial presentation to the primary veterinarian despite acute dyspnea
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case_images: Thoracic radiographs at that time were unremarkable (Figure 1).
case_images: Right lateral thoracic radiograph performed 14 days after initial presentation to the primary veterinarian depicting moderate caudoventrally located pleural effusion
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case_images: The following day the cat became severely dyspneic, and thoracic radiographs revealed moderate right-sided pleural effusion (Figure 2).
case_images: Abdominal ultrasound image depicting tubular structure ventral to and, questionably, arising from the right liver
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case_images: A small hypoechoic structure with irregular margins that contacted the diaphragm was identified, ventral to the right side of the liver (Figure 3).
case_images: Thoracic ultrasound image depicting a hyperechoic structure in right caudal thorax, in contact with the diaphragm. There is moderate pleural effusion ventral to the structure
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case_images: A hyperechoic structure was identified in the right caudal thorax in contact with the diaphragm, symmetrical to the hypoechoic abdominal structure (Figure 4).
case_images: Sagittal view of thoracoabdominal CT scan depicting open communication between the fluid-filled abdominal structure and the thorax via a defect in the diaphragm
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case_images: This revealed a fluid-dense tubular structure extending from ventral to the liver, through the diaphragm, into the thorax, and directly communicating with the pleural space (Figure 5).
case_images: Necropsy image. Visceral surface of the liver with abscessed tissue at left connecting deflated gall bladder and diaphragm
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case_images: A necropsy was performed, which identified a cholecystopleural fistula arising from the apex of the gall bladder (Figure 6) with multifocal abscesses and cellular necrosis, and severe acute fibrinous pleuritis.