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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Sudden Locking Of Knee Joints?

3 year old male with sudden onset of locked knee joint. will not bend leg and can not force leg to bend. walks with leg straight. will only bend unaffected leg to pick up item on floor. off/on for 2 weeks, but today is constant stiffness. Not complaining of pain. xrays negative. no fever.
posted on Thu, 27 Nov 2014
Twitter Fri, 23 Jan 2015 Answered on
Twitter Fri, 23 Jan 2015 Last reviewed on
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Pediatrician, Pulmonology ,  's  Response
Hi...the possibilities include -
1. Locked knee due to anterior or posterior cruciate ligament sprain during pay.
2. Non-infectious reactive effusion.
3. Weakness of the flexor muscles of the knee joint due to neurological illness.
4. Habitual mannerism.

I suggest you consult a pediatric orthopedic surgeon.
Regards - Dr. Sumanth
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What Causes Sudden Locking Of Knee Joints?

Hi...the possibilities include - 1. Locked knee due to anterior or posterior cruciate ligament sprain during pay. 2. Non-infectious reactive effusion. 3. Weakness of the flexor muscles of the knee joint due to neurological illness. 4. Habitual mannerism. I suggest you consult a pediatric orthopedic surgeon. Regards - Dr. Sumanth