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Trochanteric sciatic neuropathy.

C Crisci1, M K Baker, M B Wood

  • 1Department of Neurology, Mayo Clinic, Rochester, MN 55905.

Neurology
|November 1, 1989
PubMed
Summary
This summary is machine-generated.

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A patient experienced severe right leg weakness due to focal sciatic neuropathy. This nerve condition was likely caused by pressure from sitting on hard surfaces combined with a prominent lesser trochanter.

Area of Science:

  • Neurology
  • Nerve Disorders
  • Peripheral Neuropathy

Background:

  • Sciatic neuropathy can result from various causes, including compression and anatomical abnormalities.
  • Understanding the specific mechanisms of focal sciatic nerve damage is crucial for diagnosis and treatment.

Observation:

  • A patient presented with severe right leg weakness, atrophy, and sensory loss.
  • Physical examination revealed an enlarged, firm, and multistranded sciatic nerve at the lesser trochanter, with increased stimulation threshold.
  • Nerve fascicle biopsy showed perineurial leaflet reduplication, Renaut bodies, and an abnormal small-diameter fiber spectrum.

Findings:

  • The sciatic nerve exhibited focal enlargement and structural changes consistent with nerve compression and injury.
  • Histopathological analysis revealed characteristic features of peripheral nerve damage, including abnormal fiber size distribution.

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Implications:

  • This case suggests that prolonged pressure from sitting on hard surfaces, exacerbated by a prominent lesser trochanter, can induce focal sciatic neuropathy.
  • Identifying external pressure points and anatomical variations is important in diagnosing and managing sciatic nerve pathologies.