Successful Treatment of Spinal Cord Drop Metastasis From a Forebrain Oligodendroglioma With Radiotherapy

A 7‐year‐old female neutered French Bulldog presented with left thoracic limb paresis. Twelve months earlier, the dog had been treated with 3D conformal radiotherapy for a right piriform lobe mass (suspected glioma), which had a strong partial response following treatment. Magnetic resonance imaging (MRI) revealed an intramedullary lesion of the cervical spinal cord, suspected to be drop metastasis. This lesion was treated with intensity‐modulated radiotherapy (IMRT) (10 fractions of 3.6 Gy, total 36 Gy), with a response documented on MRI, alongside resolution of clinical signs. The dog died of unrelated causes 647 days following IMRT, and the diagnosis was confirmed at post‐mortem examination.