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Difference between revisions of "Neuropathology tumours"
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**May also be described as ''ice cream cone-shaped''.<ref>[http://www.pathology.vcu.edu/WirSelfInst/tumor-2.html http://www.pathology.vcu.edu/WirSelfInst/tumor-2.html]</ref> | **May also be described as ''ice cream cone-shaped''.<ref>[http://www.pathology.vcu.edu/WirSelfInst/tumor-2.html http://www.pathology.vcu.edu/WirSelfInst/tumor-2.html]</ref> | ||
*[[Rosette]]s - cells arranged in a pseudoglandular fashion. | *[[Rosette]]s - cells arranged in a pseudoglandular fashion. | ||
*Ependymal rosette - '''key feature'''. | |||
*"Nucleus free zones" - cells arranged around a blood vessel (perivascular pseudorosettes); nuclei of cells distant from the blood vessel, i.e. a rim of cytoplasm (from tumour cells) surrounds the blood vessel. | *"Nucleus free zones" - cells arranged around a blood vessel (perivascular pseudorosettes); nuclei of cells distant from the blood vessel, i.e. a rim of cytoplasm (from tumour cells) surrounds the blood vessel. | ||
''Perivascular pseudorosettes'' = (tumour) cells arranged around a blood vessel; nuclei of cells distant from the blood vessel, i.e. rim of cytoplasm (from tumour cells) surround blood vessel (nucleus-free zone) | **''Perivascular pseudorosettes'' = (tumour) cells arranged around a blood vessel; nuclei of cells distant from the blood vessel, i.e. rim of cytoplasm (from tumour cells) surround blood vessel (nucleus-free zone) | ||
**The nucleus free zone is composed of tumour cell cytoplasm that is adjacent to an unseen blood vessel. | **The nucleus free zone is composed of tumour cell cytoplasm that is adjacent to an unseen blood vessel. | ||
*Nuclear feature monotonous, i.e. "boring".<ref>MUN. 6 Oct 2009.</ref> | *Nuclear feature monotonous, i.e. "boring".<ref>MUN. 6 Oct 2009.</ref> | ||
**There is little variation in size, shape and staining. | **There is little variation in size, shape and staining. | ||
Images: | Images: | ||