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Malignant mixed tumor in the salivary gland of a cat
김희정,Kazuhito Itamoto,Yasuho Taura,Munekazu Nakaichi 대한수의학회 2008 Journal of Veterinary Science Vol.9 No.3
The presence of a malignant mixed tumor, also known as a carcinosarcoma, in the salivary gland is very rare. Such tumors, which are typically aggressive, are characterized by the presence of carcinomatous and sarcomatous components. A 9-year-old neutered female domestic short-haired cat presented with swelling in the right mandibular lesion that had rapidly enlarged over the previous 3 weeks. Physical examination revealed a large, fluctuated and painless subcutaneous swelling that was associated with a firm mass. Radiographs of the head revealed a soft-tissue density that involved faint circular calcific opacity. Contrast-enhanced computed tomography revealed that the peripheral capsulated cystic area had a contrast enhanced region without bone lysis. The cat received a total excision of the mass and postoperative radiotherapy. Histopathological analysis of the mass revealed that it was a malignant mixed tumor. Metastasis to the lung was discovered 7 weeks later, at which time treatment was stopped.
Primary chondrosarcoma in the skull of a dog
Munekazu Nakaichi,김희정,Kazuhito Itamoto,Yasuho Taura 대한수의학회 2007 JOURNAL OF VETERINARY SCIENCE Vol.8 No.1
Chondrosarcoma of the skull is a rare primary malignant tumor that is slow-growing, but locally aggressive. A 5- year-old, golden retriever was presented to our hospital with a swelling in the left side of her head, and the swelling had slowly enlarged over the previous month. There were no significant changes on the neurological examination. A computed tomography scan revealed a large mass involving bone destruction and prominent matrix mineralization. T1-weighted magnetic resonance imaging showed a slightly low-signal intensity area and a T2-weighted image revealed marked, high-signal intensity. There was compression of the adjacent brain parenchyma. Histopathological examination confirmed the lesion to be a chondrosarcoma.