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The Internet Journal of Neurology ISSN: 1531-295X


Foot Drop Due To Peroneal Ganglion Cyst In An Adolescent


C. Jackman Department of Neurology, Riley Hospital, Indiana University School of Medicine Indianapolis, Indiana U.S.A.
D. Sokol Department of Neurology, Riley Hospital, Indiana University School of Medicine Indianapolis, Indiana U.S.A.
K. Applegate Department of Neurology, Riley Hospital, Indiana University School of Medicine Indianapolis, Indiana U.S.A.
K. Kayes Department of Neurology, Riley Hospital, Indiana University School of Medicine Indianapolis, Indiana U.S.A.
W. Mahmud Department of Neurology, Riley Hospital, Indiana University School of Medicine Indianapolis, Indiana U.S.A.

Citation:  C. Jackman, D. Sokol, K. Applegate, K. Kayes, W. Mahmud: Foot Drop Due To Peroneal Ganglion Cyst In An Adolescent. The Internet Journal of Neurology. 2005 Volume 3 Number 2

Keywords:  Foot drop, nerve compression, ganglionic cyst

Abstract

Nerve compression by a ganglion is rare in children. Compression of the peroneal nerve by a ganglionic cyst causing foot drop is reported in an adolescent male.


Case Report

A 14 year-old male tennis player presented with a gradually progressive left foot drop. Three weeks prior, he found a knot behind his left knee that resolved. Sagital MRI T2-weighted images of the left knee demonstrated a lobulated, cystic mass, antero-lateral to the fibular head. Upon excision, a ganglion cyst was found to be compressing the common peroneal nerve. The child recovered at three months.

Conclusion

Nerve compression by a ganglion is rare in children (1). Rapid, repetitive actions involving acceleration/deceleration have been theorized to predispose ganglion cyst formation (2).


                  Figure 1: Sagittal T-2 weighted image of left knee showing ganglion cyst compressing peroneal nerve.

Figure 1: Sagittal T-2 weighted image of left knee showing ganglion cyst compressing peroneal nerve.


                  Figure 2: Axial T-2 weighted image of left knee showing ganglion cyst.

Figure 2: Axial T-2 weighted image of left knee showing ganglion cyst.

References

1. Beck,TD Jr, Miller, KE & Kruse, RW. An unusual presentation of in toeing in a child. Journal of the American Osteopathic Association, 1998; 98: 48-50.
2. Wang, DH, Koehler, SM. Isolated infraspinatus atrophy in a collegiate volleyball player. Clinical Journal of Sport Medicine, 1996; 6:255-8.

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