PSYCHOMOTOR EPILEPSY ASSOCIATED WITH METASTATIC THYMOMA IN A DOG

A seven-year-old female German shepherd dog was presented with a histo ry of anorexia, weight loss and fever of three months' duration. On ge neral examination she showed a marked behavioural change represented b y episodic excitement and 'fly snapping'. A general blood screening sh owed neutrophilia with left shift and hyperalbuminaemia. Survey radiog raphs were taken and a mass was identified in the cranial mediastinum. Cytological examination of fine needle aspiration smears of the mass yielded a presumptive diagnosis of lymphoma. The dog was euthanased an d necropsy findings concluded that the primary tumour was a thymoma; m etastases were found in the choroid plexus, leptomeninges, cerebral co rtex and hippocampus.