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Multiple Choice
'Water on the knee' is caused by _________.
A
bursitis of the prepatellar bursa
B
fracture of the patella
C
dislocation of the knee
D
torn menisci
Verified step by step guidance
1
Understand the term 'water on the knee': This condition refers to an accumulation of fluid around the knee joint, which can cause swelling and discomfort.
Identify the structures involved: The knee joint is surrounded by several bursae, which are small fluid-filled sacs that reduce friction between tissues. The prepatellar bursa is located in front of the kneecap (patella).
Consider the causes of fluid accumulation: Bursitis, which is inflammation of a bursa, can lead to fluid buildup. Specifically, prepatellar bursitis, also known as 'housemaid's knee,' is a common cause of 'water on the knee.'
Evaluate the other options: A fracture of the patella, dislocation of the knee, and torn menisci are all knee injuries but do not typically cause fluid accumulation in the same way bursitis does.
Conclude with the most likely cause: Given the symptoms and the structures involved, 'water on the knee' is most commonly associated with bursitis of the prepatellar bursa.