Magnetic resonance imaging features of multilobular osteochondrosarcoma in3 dogs

Three dogs with multilobular osteochondrosarcoma of the skull were evaluate d using magnetic resonance (MR) imaging. Spin echo T1, T2, proton weighted and post contrast TIW images were obtained with a 1.5 Tesla magnet. The MR imaging findings were similar in all three dogs with mixed signal intensiti es in the T1W, T2W and proton weighted images and fairly large areas of con trast enhancement in the post contrast T1W images. The extent of brain and soft tissue involvement were well delineated and provided useful informatio n concerning surgical planning. MR imaging provided a useful method of eval uating dogs with skull tumors.