Shabnam Hassani - Graduated from Faculty of Veterinary Medicine, Urmia branch, Islamic Azad University, Urmia, Iran
Siamak Alizadeh - Department of Clinical Sciences, Faculty of Veterinary Medicine, Naghadeh branch, Islamic Azad University, Naghadeh, Iran

This study aimed to evaluate the ultrasonographic characteristics of lymphosarcoma and also the role of fine needle biopsy in cats. In this study, five domestic short-haired and native cats with renal lymphosarcoma tumors including ۳ females and ۲ males with an average age of ۷-۹ years were collected. After each of these cats was referred to the radiology department, an ultrasound was performed by the radiologist of the abdominal cavity, and kidney symptoms were reported. In the evaluation of ultrasonography, pelvis dilatation was observed in all cats. The kidney cortex was not distinct from its central section, enlargement of the kidney in ۴ cases, deformed kidneys in ۳ cases, decreased echogenicity of the kidneys in ۳ cases, and kidney echogenic increase in ۲ cats were observed. In ۹۵% of cases, lesions were bilateral. Kidney sampling was performed by fine needle aspiration in ۴ cats. In the initial evaluation, the diagnosis was given in ۳ cases (۸۶%). The diagnosis of temporary cytology was given from round neoplasia cells in two cats. One of them, lymphosarcoma was confirmed by second aspiration, and the other cat was biopsied of the medulla tissue. In one case, the diagnosis was followed by a necropsy. The findings indicate that the signs of ultrasound of kidney lymphosarcoma in cats may not be significant, and in cases of high ultrasound characteristics, differential diagnoses should be considered. Also, biopsy for cytological tests by fine needle aspiration can be valuable in diagnosing this disease.

Cats, Lymphosarcoma, Renal, Tumor, Ultrasonography