Adrenal tumors and Pathology internal medicine neet neet pg 2020 usmle step 3 neet 2020 latest news
Neuroblastoma:
Showing small, round blue tumor cells with faintly eosinophilic fibrillary material (neuropil) that corresponds to neuritic processes of the primitive neuroblasts. Typical Homer-Wright pseudorosettes are seen, in which the tumor cells are concentrically arranged about a central space filled with neuropil.
Paraganglioma
Tumors are composed of clusters of polygonal to spindle shaped chromaffin cells or chief cells with finely granular cytoplasm and salt-and-pepper nuclear chromatin. Tumor cells are surrounded by supporting sustentacular cells, creating small nests or alveoli (zellballen) that are supplied by a rich vascular network.
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