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KMID : 1094020150320060530
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Journal of Veterinary Clinics
2015 Volume.32 No. 6 p.530 ~ p.535
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Hemorrhargic Effusion Caused by Chronic Torsion of Right Middle Lung Lobe with Concurrent Ovarian Tumor in a Female Miniature Poodle Dog
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Kim Tae-Hwan
Hong Su-Bin
Kim Min-Kyung
Shin Jeong-In
Jang Yun-Sul
Lee Jae-Hoon
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Abstract
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An 11-year-old intact female miniature poodle presented with a four-month history of hemorrhagic effusion. The patient was alert on physical examination, although muffled heart sounds were noted upon auscultation of theright hemithorax. The radiographic finding was pleural effusion. Ultrasonography revealed cystic changes in both ovariesand several nodules in the liver. A refractory opacity in the right lung field, as visualized with computer tomography(CT), was diagnosed as right middle lung lobe torsion with a collapsed bronchus. Five days after diagnosis, a rightfifth intercostal thoracotomy was performed to remove the right middle lung lobe; the right middle lung lobe wasgrossly shrunken as a result of chronic lung lobe torsion. Ovariohysterectomy was also performed. Histopathologicexamination revealed papillary adenocarcinoma in both ovaries and suspected metastasized ovarian adenocarcinomacells in the lung lobe. The patient recovered favorably and had been doing well up to two months post-surgery. However,after four months, the dog presented with respiratory difficulty. The radiographic findings were pleural effusion andcollapse of the right cranial and left caudal lung lobes. Malignant cells of epithelial origin were observed in the pleuraleffusion. The tumor cells were suspected to be metastasized cells from the previously resected lung lobe. Althoughcancer treatment was recommended, the suggestion was suspended and the dog was discharged from hospital. Thiswas a case of lung lobe torsion that had occurred because of hemorrhagic effusion due to tumor. Althoughovariohysterectomy and lobectomy were performed, there was a relapse of hemorrhagic effusion because of metastasizedtumor from the previously resected lung lobe.
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KEYWORD
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right middle lung lobe, lung lobe torsion, hemorrhagic effusion, ovarian tumor, dog
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