Common peroneal nerve palsy - denervation changes on MRI

Case contributed by Dr Chris O'Donnell

Presentation

Foot drop post trauma to the knee with surgical repair

Patient Data

Age: 40
Gender: Male

Extensive disruption to ligamentous structures laterally in the knee as well as post operative changes. The common peroneal nerve is susceptible to injury laterally in the knee especially as it winds around the neck of the fibula. Note typical denervation changes to muscle supplied by both the superficial and deep branches of the nerve (i.e. anterior compartment of the leg) characterized by oedema (T2 brightening) as well as atrophy and early fatty replacement indicating that the denervation has been present for some time (i.e. weeks to months).

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Case Information

rID: 18681
Case created: 17th Jul 2012
Last edited: 10th Nov 2015
Inclusion in quiz mode: Included

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