Differential Diagnosis for Pain Above Olecranon Process and Radiating Over Lateral Epicondyle

• Single Most Likely Diagnosis
  • Lateral Epicondylitis (Tennis Elbow): This condition is characterized by pain on the outer part of the elbow, which is consistent with the location described. The pain often radiates over the lateral epicondyle and can be exacerbated by activities that involve gripping or twisting, making it a common issue for individuals who frequently use their wrists and forearms in a repetitive manner.
• Other Likely Diagnoses
  • Radial Tunnel Syndrome: This condition involves compression of the radial nerve as it travels through the radial tunnel near the elbow. Symptoms can include pain on the back of the hand or the thumb side of the back of the forearm, which might radiate over the lateral epicondyle, and can be exacerbated by activities that involve twisting or bending the wrist.
  • Olecranon Bursitis: Although the primary symptom of olecranon bursitis is swelling at the back of the elbow, pain can occur above the olecranon process. The condition is often associated with direct trauma, infection, or repetitive pressure on the elbow.
• Do Not Miss Diagnoses
  • Fracture of the Radial Head or Neck: A fracture in this area can cause pain that might be referred over the lateral epicondyle. It's crucial to consider this diagnosis, especially if there's a history of trauma, as missing a fracture could lead to improper healing and long-term dysfunction.
  • Osteochondritis Dissecans of the Capitellum: This condition involves a piece of cartilage and bone becoming detached from the capitellum (the end of the humerus bone in the elbow). It can cause elbow pain, especially with activities involving throwing or weight-bearing on the elbow, and might radiate pain over the lateral aspect of the elbow.
• Rare Diagnoses
  • Posterior Interosseous Nerve (PIN) Syndrome: A rare condition where the posterior interosseous nerve, a branch of the radial nerve, is compressed. Symptoms can include pain and weakness in the forearm and wrist, potentially radiating over the lateral epicondyle.
  • Elbow Osteonecrosis: A rare condition where there is a loss of blood to the bone tissue, leading to the death of bone tissue. This could potentially cause pain in the area described, especially if the capitellum or another part of the elbow is affected.