Stress fractures around the knee.

Stress fractures of the lower extremities are common, especially in the younger athletic population. The current literature consists mainly a variety of case reports but is devoid of any sizeable series of knee stress fracture investigations. Diagnosing a stress fracture around the knee can be a challenge. The proximity of the stress fracture to the knee joint may lead the clinician to investigate intra-articular or other periarticular pathology. The differential diagnosis can be large, including bursitis, tendonitis, mechanical causes, insufficiency fracture, and tumor. A high index of suspicion is necessary to confirm the underlying diagnosis. A patient's medical history combined with a physical examination and imaging modalities will aid the physician in arriving at the diagnosis of stress fracture.