What is the first step in diagnosing osteosarcoma?

The first step in diagnosing osteosarcoma typically involves obtaining X-rays of the affected area. X-rays are crucial as they provide an initial assessment of the bone structure and can reveal characteristic changes associated with osteosarcoma, such as bone lysis, new bone formation, and the presence of a mass. These images help veterinary oncologists determine the extent of the disease and whether further investigation is warranted.

While blood tests, biopsies, and physical examinations are all important components of the overall diagnostic process, they are usually conducted after X-rays indicate potential osteosarcoma. Blood tests can provide general health information and may show elevated markers or conditions related to cancer, but they do not specifically indicate osteosarcoma. A physical examination might suggest a problem, but radiography is key in visualizing the lesion. Finally, a biopsy is essential for a definitive diagnosis and confirming the type of cancer, but it is performed after initial imaging has suggested the possibility of osteosarcoma. Therefore, X-rays serve as the foundational step in the diagnostic protocol for suspected osteosarcoma.