This dog had a multi lobular osteochondrosarcoma of the skull. A CT scan was done to assess the tumour penetration and required surgical margins. Surgical excision was performed exposing the underlying brain. Southpaws (Melbourne, Australia) offer specialist veterinary services by referral - for surgery - neuro, orthopaedic (including TPLO, TTA and extra capsular), soft tissue, minimally invasive and surgical oncology. Our other major disciplines are internal medicine (including imaging) and cancer care (medical oncology (chemo, immuno and hormonal therapy), radiation therapy). We also offer cardiology surgery and services, stem cell therapy for osteo-arthritis and physiotherapy.