Osteochondrosis or Bannier's disease involves which structure?

Osteochondrosis or Bannier's disease involves which structure?

• A. Capitellum
• B. Trochlea
• C. Lateral epicondyle
• D. Medial epicondyle

Answer: (A)

Bannière disease is osteochondrosis of the capitellum, the distal humeral articular surface that contacts the radial head. It occurs in skeletally immature athletes, especially throwers, due to repetitive stress that impairs the capitellum’s blood supply, causing ischemic necrosis and possible fragmentation. Because the problem is localized to the capitellum, this condition involves that structure rather than the trochlea or the epicondyles. Clinically, you may see lateral elbow pain with activity and limited motion; imaging can reveal capitellar flattening or fragmentation, and loose bodies can develop in advanced cases. Management focuses on rest and avoiding further elbow stress, with surgery reserved for displaced fragments or persistent symptoms.

Bannière disease is osteochondrosis of the capitellum, the distal humeral articular surface that contacts the radial head. It occurs in skeletally immature athletes, especially throwers, due to repetitive stress that impairs the capitellum’s blood supply, causing ischemic necrosis and possible fragmentation. Because the problem is localized to the capitellum, this condition involves that structure rather than the trochlea or the epicondyles. Clinically, you may see lateral elbow pain with activity and limited motion; imaging can reveal capitellar flattening or fragmentation, and loose bodies can develop in advanced cases. Management focuses on rest and avoiding further elbow stress, with surgery reserved for displaced fragments or persistent symptoms.