A patellar tendon rupture occurs when the tendon connecting the patella (kneecap) to the tibia (shinbone) tears. This injury often results from sudden, forceful movements, such as jumping or landing awkwardly. Symptoms typically include severe pain, swelling, and difficulty straightening the knee. Diagnosis is usually confirmed through a physical examination and imaging tests like an MRI or X-ray. Treatment often involves surgery to repair the torn tendon, followed by rehabilitation to restore strength and mobility. Early intervention is crucial for optimal recovery and to prevent long-term complications.