the presence and distribution of intermediate filament proteins , such as cytokeratins , vimentin , neurofilament proteins and glial fibrillary acidic protein were assessed immunohistochemically in pituitary adenomas , medullary thyroid carcinomas , endocrine pancreatic tumours , gastric , intestinal and bronchial carcinoids , parathyroid adenomas , pheochromocytomas , paragangliomas and related non-neoplastic tissues .
C0021769
intermediate filament proteins
C0017626
glial fibrillary acidic