Malignant mixed tumor in the salivary gland of a cat.
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.
Kim
Heejaung
H
Department of Neurology, College of Medicine, Hanyang University, Seoul 133-792, Korea.
Nakaichi
Munekazu
M
Itamoto
Kazuhito
K
Taura
Yasuho
Y
D000230:Adenocarcinoma / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D000818:Animals; D002371:Cat Diseases / Q000000981:diagnostic imaging* / Q000473:pathology*; D002415:Cats; D002813:Chondrosarcoma / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D017809:Fatal Outcome; D005260:Female; D008168:Lung / Q000000981:diagnostic imaging / Q000473:pathology; D013902:Radiography, Thoracic / Q000662:veterinary; D012468:Salivary Gland Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*