The evaluation of a Baker's cyst begins with a medical history and physical examination.

Physical findings in someone with a Baker's cyst may include:

• Knee swelling:
• Particularly behind the knee
• Tenderness behind the knee
• Swollen calf

Tests are often required to exclude other conditions that cause symptoms or physical findings similar to a Baker's cyst.

Tests that may be used to evaluate a Baker's cyst include:

• Knee x-ray
• Knee ultrasound
• Knee MRI