Abstract
BACKGROUND: Nerve injury due to a movable cystic mass during knee motion is a rare neuropathy, which can be diagnosed precisely using a dynamic ultrasonogram. OBJECTIVE: To present a case with foot drop and common peroneal neuropathy that involved a movable cystic mass during knee flexion adjacent to the proximal tibiofibular joint. METHODS: Case report. RESULTS: A 47-year-old female was referred to our institute for a right foot drop. Common peroneal nerve (CPN) injury was confirmed by an electrophysiologic study. Upon a dynamic ultrasonographic study during knee flexion, a cystic mass was found that was not scanned on the static images. The mass displaced the lateral head of the gastrocnemius muscle and CPN. A cystic mass that was adjacent to the proximal tibiofibular joint was confirmed by magnetic resonance imaging. CONCLUSION: Ultrasonography is a convenient first-line diagnostic method of peripheral nerve disorder by virtue of its higher spatial resolution, cost-effectiveness, and prompt diagnosis. The real-time and dynamic scanning attributes are the discriminative merits of this imaging tool. This case report suggests that CPN compression occurred due to a movable cystic mass during knee flexion. Dynamic ultrasonographic evaluations could be helpful to diagnose pathologic musculoskeletal conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 667-670 |
| Number of pages | 4 |
| Journal | Journal of Back and Musculoskeletal Rehabilitation |
| Volume | 31 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2018 Jan 1 |
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Keywords
- Foot drop
- peroneal neuropathy
- ultrasonogram
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
- Rehabilitation
Cite this
Foot drop caused by a movable cystic mass during knee motion. / Kim, Nack Hwan; Lee, Sang Heon.
In: Journal of Back and Musculoskeletal Rehabilitation, Vol. 31, No. 4, 01.01.2018, p. 667-670.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Foot drop caused by a movable cystic mass during knee motion
AU - Kim, Nack Hwan
AU - Lee, Sang Heon
PY - 2018/1/1
Y1 - 2018/1/1
N2 - BACKGROUND: Nerve injury due to a movable cystic mass during knee motion is a rare neuropathy, which can be diagnosed precisely using a dynamic ultrasonogram. OBJECTIVE: To present a case with foot drop and common peroneal neuropathy that involved a movable cystic mass during knee flexion adjacent to the proximal tibiofibular joint. METHODS: Case report. RESULTS: A 47-year-old female was referred to our institute for a right foot drop. Common peroneal nerve (CPN) injury was confirmed by an electrophysiologic study. Upon a dynamic ultrasonographic study during knee flexion, a cystic mass was found that was not scanned on the static images. The mass displaced the lateral head of the gastrocnemius muscle and CPN. A cystic mass that was adjacent to the proximal tibiofibular joint was confirmed by magnetic resonance imaging. CONCLUSION: Ultrasonography is a convenient first-line diagnostic method of peripheral nerve disorder by virtue of its higher spatial resolution, cost-effectiveness, and prompt diagnosis. The real-time and dynamic scanning attributes are the discriminative merits of this imaging tool. This case report suggests that CPN compression occurred due to a movable cystic mass during knee flexion. Dynamic ultrasonographic evaluations could be helpful to diagnose pathologic musculoskeletal conditions.
AB - BACKGROUND: Nerve injury due to a movable cystic mass during knee motion is a rare neuropathy, which can be diagnosed precisely using a dynamic ultrasonogram. OBJECTIVE: To present a case with foot drop and common peroneal neuropathy that involved a movable cystic mass during knee flexion adjacent to the proximal tibiofibular joint. METHODS: Case report. RESULTS: A 47-year-old female was referred to our institute for a right foot drop. Common peroneal nerve (CPN) injury was confirmed by an electrophysiologic study. Upon a dynamic ultrasonographic study during knee flexion, a cystic mass was found that was not scanned on the static images. The mass displaced the lateral head of the gastrocnemius muscle and CPN. A cystic mass that was adjacent to the proximal tibiofibular joint was confirmed by magnetic resonance imaging. CONCLUSION: Ultrasonography is a convenient first-line diagnostic method of peripheral nerve disorder by virtue of its higher spatial resolution, cost-effectiveness, and prompt diagnosis. The real-time and dynamic scanning attributes are the discriminative merits of this imaging tool. This case report suggests that CPN compression occurred due to a movable cystic mass during knee flexion. Dynamic ultrasonographic evaluations could be helpful to diagnose pathologic musculoskeletal conditions.
KW - Foot drop
KW - peroneal neuropathy
KW - ultrasonogram
UR - http://www.scopus.com/inward/record.url?scp=85053931257&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053931257&partnerID=8YFLogxK
U2 - 10.3233/BMR-170849
DO - 10.3233/BMR-170849
M3 - Article
C2 - 29562484
AN - SCOPUS:85053931257
VL - 31
SP - 667
EP - 670
JO - Journal of Back and Musculoskeletal Rehabilitation
JF - Journal of Back and Musculoskeletal Rehabilitation
SN - 1053-8127
IS - 4
ER -