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Malignant granular cell tumour of the sciatic nerve
M A Hurrell1, C McLean, P Desmond
1Department of Radiology, Royal Melbourne Hospital, Parkville, Victoria, Australia.
Australasian Radiology
|February 1, 1995
Summary
A rare malignant granular cell tumour (MGCT) of the sciatic nerve was identified. Imaging revealed specific characteristics on CT and MRI, with pathology suggesting Schwann cell origin.
Area of Science:
- Neuro-oncology
- Diagnostic Imaging
- Surgical Pathology
Background:
- Malignant granular cell tumours (MGCTs) are rare, aggressive neoplasms.
- The sciatic nerve is an uncommon site for MGCTs, posing diagnostic and therapeutic challenges.
Observation:
- A case of MGCT involving the sciatic nerve is presented.
- Computed tomography (CT) showed the tumour as isodense with muscle, with minimal contrast enhancement.
- Magnetic resonance (MR) imaging revealed T1 isointensity with muscle and marked enhancement, and isointensity with fat on proton and T2-weighted images.
Findings:
- Imaging findings on CT and MRI provided key diagnostic clues.
- Pathological examination confirmed the diagnosis and suggested Schwann cell histogenesis for the MGCT.
Implications:
- Accurate pre-operative imaging is crucial for surgical planning of sciatic nerve tumours.
- Understanding the imaging features of MGCTs aids in differentiating them from other sciatic nerve pathologies.
- This case contributes to the literature on rare MGCT presentations and their imaging characteristics.