Differential Diagnosis for Right Knee Pain
Single Most Likely Diagnosis
- Medial Plica Syndrome: This condition is a common cause of knee pain, especially in athletes who participate in sports that involve running, jumping, or quick changes of direction, such as soccer. The pain is typically localized to the medial aspect of the knee and is exacerbated by palpation. The fact that the pain persists only to palpation and not during ambulation supports this diagnosis.
Other Likely Diagnoses
- Iliotibial (IT) Band Friction Syndrome: This condition is common in runners and cyclists but can also occur in soccer players. It causes pain on the lateral aspect of the knee, which can be exacerbated by palpation. However, the pain is often worse during activities like running.
- Pes Anserine Bursitis: This condition causes pain on the medial aspect of the knee, approximately 2-3 inches below the knee joint. It is more common in athletes who participate in sports that involve running or quick changes of direction.
- Quadriceps or Patellar Tendinopathy: These conditions can cause pain in the front of the knee, which can be exacerbated by palpation. They are common in athletes who participate in sports that involve jumping or quick changes of direction.
Do Not Miss Diagnoses
- Osteonecrosis of the Femoral Condyle: This is a serious condition that can cause knee pain, especially if the blood supply to the femoral condyle is compromised. It is essential to consider this diagnosis, especially if the patient has a history of trauma or steroid use.
- Infection (Septic Arthritis): Although the patient does not have a history of trauma or fever, it is crucial to consider the possibility of infection, especially if the patient has a compromised immune system or a history of recent infections.
- Tumor (Osteosarcoma or Chondrosarcoma): Although rare, it is essential to consider the possibility of a tumor, especially if the patient has a history of night pain or unexplained weight loss.
Rare Diagnoses
- Chronic Regional Pain Syndrome (CRPS): This condition is rare and can cause persistent pain, swelling, and limited range of motion in the affected limb.
- Saphenous Nerve Entrapment: This condition can cause pain or numbness in the medial aspect of the knee, which can be exacerbated by palpation.
- Ganglion Cyst: This condition can cause a lump or mass in the knee, which can be painful, especially if it compresses nearby nerves or tendons.