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Sartorius muscle tear presenting as acute meralgia paresthetica
1McMaster University, St. Joseph's Healthcare Hamilton, Dept. of Diagnostic Imaging, 50 Charlton Ave. E., Hamilton, ON L8N 4A6, Canada.
Clinical Imaging
|June 5, 2018
Summary
A sartorius muscle tear caused acute meralgia paresthetica in a healthy male. This rare presentation, linked to hematoma compressing the lateral femoral cutaneous nerve, is the first documented case from a muscular tear.
Area of Science:
- Orthopedics
- Neurology
- Radiology
Background:
- Meralgia paresthetica, characterized by lateral femoral cutaneous nerve (LFCN) compression, typically results from external pressure.
- Traumatic causes of meralgia paresthetica are uncommon, with previous reports primarily linked to anterior superior iliac spine fractures.
Observation:
- A 67-year-old male presented with hip and anterolateral thigh pain, numbness, and bruising.
- Ultrasound revealed an intramuscular tear of the sartorius muscle with an associated acute hematoma.
- The hematoma was observed to surround the LFCN, suggesting nerve compression.
Findings:
- The patient's symptoms were attributed to neuropraxia of the LFCN secondary to the sartorius muscle tear and hematoma.
- This case represents the first documented instance of meralgia paresthetica caused by a sartorius muscle tear.
Implications:
- Highlights the importance of considering muscle tears and associated hematomas in the differential diagnosis of traumatic meralgia paresthetica.
- Suggests ultrasound as a valuable tool for diagnosing such injuries.
- Expands the known etiologies of LFCN compression injuries.
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