The acutely injured knee.

Area of Science:

• Orthopedics
• Radiology
• Sports Medicine

Background:

• Acute knee pain is a frequent reason for outpatient clinic visits.
• While many knee injuries are minor, some necessitate specialized orthopedic assessment.
• Extensor mechanism injuries, tibial plateau fractures, and multi-ligament knee injuries are examples of urgent cases.

Purpose of the Study:

• To outline the diagnostic approach for acute knee pain in an outpatient setting.
• To differentiate between minor knee injuries and those requiring prompt orthopedic surgical evaluation.
• To highlight the role of advanced imaging in diagnosing complex knee injuries.

Main Methods:

• Clinical assessment including thorough patient history and physical examination.
• Initial diagnostic imaging with standard radiographs (X-rays).
• Utilization of magnetic resonance imaging (MRI) when initial diagnosis is uncertain.

Main Results:

• History and physical examination, along with radiographs, are often adequate for diagnosing urgent knee injuries.
• Magnetic resonance imaging is the preferred modality for diagnosing ligamentous, tendinous, meniscal, and chondral injuries when uncertainty persists.
• Prompt orthopedic evaluation is crucial for specific severe knee injuries.

Conclusions:

• A systematic approach combining clinical evaluation and appropriate imaging is essential for managing acute knee pain.
• Early identification and management of severe knee injuries can prevent long-term complications.
• Magnetic resonance imaging plays a critical role in the definitive diagnosis of internal derangements of the knee.