EURORAD ESR

Case 16243

Sciatic Nerve Entrapment Neuropathy: A rare cause at a rare site

Author(s)
Dr. Adil Khan, Post graduate Resident, Department of Radiodiagnosis
Dr. Arjit Agarwal, Associate Professor, Department of Radiodiagnosis
Dr. Shruti Chandak, Professor, Department of Radiodiagnosis

TEETTHANKER MAHAVEER HOSPITAL, TMMC & RC; BAGADPUR 244001 MORADABAD, India; Email:drarjit26@gmail.com
 
Patient
female, 18 year(s)
 
 
  • Figure 1
    High resolution USG of posterior aspect of distal thigh
     

    Grayscale ultrasound image of the posterior part of distal thigh region, showing an ill defined hypoechoic nodular lesion (white arrow) adjacent to the distal part of the superficial femoral artery (asterisk).

     
    Area of Interest: Extremities; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations; Inflammation;

    Power Doppler image showing abnormal vascular channel within the lesion (white arrow) adjacent to the superficial femoral artery and vein (A, V).

     
    Area of Interest: Extremities; Imaging Technique: Ultrasound-Power Doppler; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    High-resistance arterial flow within the lesion.

     
    Area of Interest: Extremities; Imaging Technique: Ultrasound-Spectral Doppler; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    Grayscale ultrasound image of posterior distal thighs, showing fatty changes of left long-head of the biceps femoris muscle (red arrow) with distal acoustic attenuation in comparison to normal muscle echotexture on...

     
    Area of Interest: Extremities; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Biological effects;

    Thickened sciatic nerve in the distal posterior thigh

     
    Area of Interest: Neuroradiology peripheral nerve; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Inflammation;
     
     
  • Figure 2
    MRI of Thigh
     

    T1W Axial MR image of distal thighs; showing vascular lesion (red-circle), thickened sciatic nerve (white-circle) with fatty biceps femoris muscle on the left side (curved arrow); LH-long head, SH-short head of biceps...

     
    Area of Interest: Extremities; Neuroradiology peripheral nerve; Vascular; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations; Inflammation;

    T1W Axial MR image of distal thighs at distal level; showing division of left sciatic nerve into thickened tibial nerve (red-arrow) and normal common peroneal nerve (white arrow)

     
    Area of Interest: Extremities; Neuroradiology peripheral nerve; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Inflammation;

    PDFS Axial MRI image of distal thighs; showing thickened and hyperintense left sciatic nerve (white circle) with vascular malformation (red circles) infiltrating the sciatic nerve and fatty biceps femoris (curved...

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Neuroradiology peripheral nerve; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations; Biological effects;

    T1W coronal MRI images of thigh region, showing thickened distal sciatic nerve and its tibial branch (white arrows), abutting the vascular malformation (red-circle) with fatty atrophy of biceps femoris muscle (curved...

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Neuroradiology peripheral nerve; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    STIR coronal MRI images of thigh region, showing thickened and hyperintense distal sciatic nerve (white arrow) and hyperintense AVMs in lower thigh and gluteal regions on the left side.

     
    Area of Interest: Extremities; Vascular; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;
     
     
Grayscale ultrasound image of the posterior part of distal thigh region, showing an ill defined hypoechoic nodular lesion (white arrow) adjacent to the distal part of the superficial femoral artery (asterisk).
 
Power Doppler image showing abnormal vascular channel within the lesion (white arrow) adjacent to the superficial femoral artery and vein (A, V).
 
High-resistance arterial flow within the lesion.
 
Grayscale ultrasound image of posterior distal thighs, showing fatty changes of left long-head of the biceps femoris muscle (red arrow) with distal acoustic attenuation in comparison to normal muscle echotexture on right side (white arrow).
 
Thickened sciatic nerve in the distal posterior thigh
 
T1W Axial MR image of distal thighs; showing vascular lesion (red-circle), thickened sciatic nerve (white-circle) with fatty biceps femoris muscle on the left side (curved arrow); LH-long head, SH-short head of biceps femoris.
 
T1W Axial MR image of distal thighs at distal level; showing division of left sciatic nerve into thickened tibial nerve (red-arrow) and normal common peroneal nerve (white arrow)
 
PDFS Axial MRI image of distal thighs; showing thickened and hyperintense left sciatic nerve (white circle) with vascular malformation (red circles) infiltrating the sciatic nerve and fatty biceps femoris (curved arrow).
 
T1W coronal MRI images of thigh region, showing thickened distal sciatic nerve and its tibial branch (white arrows), abutting the vascular malformation (red-circle) with fatty atrophy of biceps femoris muscle (curved arrow)
 
STIR coronal MRI images of thigh region, showing thickened and hyperintense distal sciatic nerve (white arrow) and hyperintense AVMs in lower thigh and gluteal regions on the left side.
 
 
 
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