Talk:Pineal gland: Difference between revisions
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==Pineocytoma== | ==Pineocytoma== | ||
===Microscopic=== | ===Microscopic=== | ||
1-3. The sections show a cellular lesion composed of cells of uniform size with benign nuclear features. The cells form large irregular-shaped rosettes with neuropil at the centre (pineocytoma/neurocytoma-type rosette). | 1-3. The sections show a cellular lesion composed of cells of uniform size with benign nuclear features. The cells form large irregular-shaped rosettes with neuropil at the centre (pineocytoma/neurocytoma-type rosette). There are no multi-nucleated giant cells and no hyperchromatic nuclei. No mitotic activity is identified. | ||
There are no multi-nucleated giant cells | |||
The cytoplasm has positive immunostaining with synaptophysin and neuron-specific enolase (NSE). The tumour cells are negative for GFAP and chromogranin A. The Ki-67 stains approximately 5% of cells. | The cytoplasm has positive immunostaining with synaptophysin and neuron-specific enolase (NSE). The tumour cells are negative for GFAP and chromogranin A. The Ki-67 stains approximately 5% of cells. | ||