Neuroblastoma in the dog.

Two malignant canine tumours of peripheral neuronal tissue are described. A mediastinal neuroblastoma was found in a 15-mth-old Boston Terrier with dyspnoea. The tumour compressed adjacent lung and invaded the cervical spinal cord. A retroperitoneal ganglioneuroma was found in a 2-yr-old Labrador with posterior ataxia and atrophy of the muscles of the hind legs. This tumour surrounded adjacent adjacent soft tissues and invaded the overlying vertebrae.