Related Experiment Videos
[Primary meningeal intermediate grade melanocytic neoplasm: case report with radiologic-pathologic correlation]
T Moser1, T S Nogueira, W Fakhoury
1Service de Radiologie 2, Hôpital de Hautepierre, avenue Molière, 67098 Strasbourg Cedex. moser_th@yahoo.fr
Journal of Neuroradiology = Journal De Neuroradiologie
|March 31, 2005
Summary
This case report details a rare primary meningeal intermediate grade melanocytic neoplasm. Histology and specific MRI findings are key for diagnosing this central nervous system tumor.
Area of Science:
- Neuropathology
- Neuroradiology
- Oncology
Background:
- Primary melanocytic neoplasms of the central nervous system (CNS) are rare.
- These tumors arise from leptomeningeal melanocytes.
- Intermediate grade lesions represent a diagnostic challenge within the spectrum.
Observation:
- A case involving the C2 nerve root is presented.
- The lesion was extra-axial, located in the posterior fossa/cervical spinal canal.
- MRI demonstrated characteristic T1 and T2 shortening.
Findings:
- Histopathology is crucial for definitive diagnosis.
- Spindle-shaped melanocytic cells positive for Fontana stain and HMB:45 antigen were observed.
- Tumor cellularity, pleomorphism, mitotic rate, proliferation index, and invasiveness help classify the tumor spectrum.
Implications:
- Early recognition of MRI features can suggest this rare diagnosis.
- Accurate histological assessment is vital for differentiating benign melanocytoma from malignant melanoma.
- Understanding these criteria aids in appropriate patient management and prognosis.