system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following is true about acute rupture of tendc calcaneus   (tendo-achillis)?
assistant
The correct answer is  This is injury of middle aged persons usually occuring due to unaccustomed exercise. Direct injury is not the cause of tendon | rupture although most patients feel as if something has hit. X-Rays are of no value in diagnosis. Planterflexion of ankle on compression of calf occurs when the tendon is intact and its absence signifies tendon rupture. Surgical repair is preferable treatment.