In plain language
Tearing of the kneecap-to-tibia tendon can interrupt active knee extension.
Clinical Significance & Management
Assess the extensor mechanism promptly; complete tears usually need surgical evaluation.
Symptoms & Clinical Presentation
Pain below the kneecap, swelling, bruising, giving way or inability to extend.
Etiology & Injury Mechanisms
- Forceful landing, falls or direct trauma; prior tendinopathy increases risk.
Diagnostics & Imaging Guide
Active extension, straight-leg raise and patellar position; X-rays and MRI as indicated.
Treatment Options
Protect and obtain specialist care; partial tears may be managed conservatively, complete tears often repaired.
Rehabilitation Milestones & Timeline
Rehabilitation depends on the diagnosis, procedure and associated injuries. Progression requires assessment of healing, symptoms and function; elapsed time or a single test cannot determine readiness for sport.
Rehabilitation progression
Follow flexion and loading limits, rebuild quadriceps control and assess function before impact.
Evidence-Based Clarifications
Chronic tendon pain and acute rupture require different care.
Sources & References
Educational clinical definitions synthesized from AAOS, Cleveland Clinic, Mayo Clinic, and HSS. Individual diagnosis and surgery require professional medical evaluation.
Publication date
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