CLINICAL NOTES: Slip 1 Lumbar intradural lesion. Slip 2 Thoracic cyst wall. Slip 3 Lumbar intradural lesion and thoracic arachnoid adhesions - thick wall, arachnoid.
MACROSCOPIC DESCRIPTION:
- "Thoracic spinal cyst" FS/SMEAR DIAGNOSIS: Fibrous tissue. Benign.
- "Lumbar intradural lesion" FS DIAGNOSIS: Myxopapillary ependymoma.
- "Lumbar intradural lesion"
- "Thick wall"
- "Arachnoid"
MICROSCOPIC DESCRIPTION: 1,5. Sections show unremarkable dense fibrous connective tissue, consistent with a ligament. No tumour is seen. 2,3. Sections show a moderately cellular myxopapillary ependymoma composed of well-formed perivascular pseudorosettes with central hyalinized blood vessels and micro cystic structures containing myxoid material. Radially arranged bland tumour cells contain oval nuclei with fine chromatin and inconspicuous nucleoli. No mitoses, necrosis or microvascular proliferation are seen. 4. Sections show unremarkable arachnoidal tissue composed of loose collagen fibres partially lined by meningothelial cells. No tumour is seen.
DIAGNOSIS:
- Thoracic spine, cyst: Unremarkable dense fibrous tissue.
- Lumbar spine, intradural lesion: Myxopapillary ependymoma (WHO I).
- Lumbar spine, intradural lesion: Myxopapillary ependymoma (WHO I).
- Thick wall: Unremarkable arachnoidal tissue.
- Arachnoid tissue: Unremarkable dense fibrous tissue.
Slides courtesy of Prof. Michael Gonzales - RMH Pathology Department