断肢術後に肺転移をきたした骨膜性骨肉腫の犬の1例 Surgical Remove of Pulmonary Metastases after Amputation of the Limb Where a Primary Parosteal Osteosarcoma had Developed in a Dog

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12歳の雌のシー・ズーが,左前腕骨の腫脹を主訴に来院した。X線検査および細針吸引生検により傍骨性骨肉腫と仮診断した。第10病日に左前肢の断肢術を実施した。病理検査結果により骨膜性骨肉腫と診断された。断肢術後にカルボプラチン投与を実施したが,断肢術後557日の胸部単純X線検査で肺転移とみなされる2つの陰影が認められた。腫瘤は徐々に拡大し,発咳もみられるようになったので,断肢術後725日に左肺前葉の肺葉切除術を実施した。術後の経過は良好であったが,肺葉切除後73日目で肺全域に小さな結節性腫瘤が多数形成されていた。肺葉切除後6カ月間は発咳もほとんど認めずQOLは維持されていたが,徐々に発咳の頻度が増加し肺葉切除後230日目 (断肢術後955日目)に死亡した。

A 12-year-old, female Shih Tzu was brought in because of a left forelimb swelling. X-rays and fine needle aspirates showed a mass in the distal antebrachium, and the lesion was tentatively diagnosed as a parosteal osteosarcoma. Ten days later, the left forelimb was amputated. Histopathologically, the disease was confirmed as parosteal osteosarcoma. In thoracic X-ray examinations, two definite pulmonary metastases were found on the 557th day after amputation, in spite of occasional chemotherapy with carboplatin. Because the tumors in the lung gradually grew larger, and coughing became severer, the cranial lobe of the left lung was removed on the 725th day after amuputation, and the postoperative course was good. However, on the 73rd day after the pulmonary metastasectomy, a number of small nodes were seen everywhere throughout the whole lung, indicating recurrence. Even so, the dog's quality of life was satisfactory, being almost free of coughing for six months after resection of the lung lobe. Finally the coughing worsened, and the dog died on the 230th day after metastasectomy, that is, 955 days after amputation.

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  • 動物臨床医学 = Journal of Animal Clinical Research Foundation

    動物臨床医学 = Journal of Animal Clinical Research Foundation 20(4), 141-148, 2011-12-31

    動物臨床医学会

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