How Often Are Osteosarcoma Follow-Up Scans Needed?

Finishing treatment for osteosarcoma is a major milestone, but it marks the beginning of a new phase: survivorship and surveillance. Because osteosarcoma has a risk of returning (relapse) and treatments can cause long-term side effects, patients—whether children, teenagers, or young adults—will need a structured schedule of check-ups and scans ^[1].

A Typical Surveillance Timeline

While major medical guidelines (such as those from the NCCN and ESMO) provide standard frameworks for monitoring, your care team will tailor the exact schedule to your specific tumor, the type of surgery you had, and your overall risk.

For the first five years after treatment ends—when the risk of recurrence is highest—a typical schedule for physical exams and imaging looks like this:

• Years 1 and 2: Every 3 months
• Years 3, 4, and 5: Every 4 to 6 months
• Beyond Year 5: Annually ^[2]

What Kind of Scans Are Used?

At these visits, the medical team is primarily looking to see if the tumor has returned to its original location (local recurrence) or if it has spread to the lungs (pulmonary metastasis). Keep in mind that not every scan is performed at every visit.

• Chest Imaging: The lungs are the most common site for osteosarcoma to spread, making chest imaging a critical part of surveillance ^[3][4]. Your team may use traditional chest X-rays, Chest Computed Tomography (CT), or an alternating schedule of both. While a chest CT is much more sensitive for detecting tiny lung nodules ^[5], it also exposes patients to more radiation than an X-ray. Because young patients are vulnerable to cumulative radiation, care teams weigh the need for detailed images against radiation risks, often using pediatric low-dose CT protocols ^[6][7]. Note: If a scan shows a tiny nodule, it does not automatically mean the cancer has returned; many nodules are benign (non-cancerous).
• Local Site Imaging: To ensure the cancer has not returned to the original bone, the primary tumor site is regularly imaged ^[8]. Depending on the surgery, this might involve plain X-rays or Magnetic Resonance Imaging (MRI), which provides excellent detail of soft tissue and bone marrow ^[9][10]. If the patient had limb-salvage surgery (surgery that removes the tumor while preserving the arm or leg) with metal implants, the metal can cause artifacts—distortions or blank spots on an MRI. In those cases, teams may use special MRI techniques or, selectively, an FDG PET/CT (a scan using a safe, glucose-like radioactive tracer) to evaluate the area ^[11].

Monitoring for Late Effects

Survivorship care isn’t just about looking for cancer; it is also about monitoring for the long-term impacts of intensive treatment. Depending on the specific chemotherapy drugs used, the annual survivorship exams may include monitoring heart function (if doxorubicin was used), checking kidney health and hearing (if cisplatin was used), and assessing bone growth and joint function.

Navigating Life Between Scans

The intense monitoring in the first two years can be exhausting, and the fear of recurrence—often called “scanxiety”—is very real for families. It is important to know that surveillance aims to identify any possible recurrence early while it may still be treatable, but you should not wait for a scheduled scan if you notice concerning changes. Contact your oncology team if you or your child experience new, persistent pain or swelling at the surgery site, changes in how the limb functions, unexplained fevers, a persistent cough, or chest pain.