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Patellar tendon rupture

Summary of Patellar tendon rupture
Patellar tendon rupture is a rupture of the tendon that connects the patella to the tibia. The tell-tale sign of a ruptured patella tendon is the movement of the patella further up the quadriceps. When rupture occurs, the patella loses support from the tibia and moves toward the hip when the quadriceps muscle contracts, hindering the leg's ability to extend. This means that those affected cannot stand, as their knee buckles and gives way when they attempt to do so.



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Musculoskeletal system pathology review

Patellar tendon rupture


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High Yield Notes
12 pages

Patellar tendon rupture

5 flashcards

USMLE® Step 1 style questions USMLE

1 questions

A 61-year-old Caucasian man comes to the office because of acute onset of knee pain and swelling. His medical history is relevant for Sjogren's disease and a recent community-acquired pneumonia. He currently takes prednisone and levofloxacin. Upon further interrogation, the patient mentions that he was walking down the street when he suddenly felt a "snapping" sound and severe pain on his left knee. Physical exam shows localized tenderness and palpable pain on his left knee, in addition to, a "floating" displaced patella and limited knee extension. His temperature is 36.7°C (97.9°F), pulse is 87/min, respirations are 18/min, blood pressure is 130/60 mmHg. A conventional knee radiograph is obtained and shown below.    

Which of the following is the most likely diagnosis?