title: Letter: Unusual tubular structures in brain reticulum-cell sarcoma.
mesh_terms: D001344:Autopsy; D001932:Brain Neoplasms / Q000473:pathology*; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology*; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D010252:Paramyxoviridae; D014764:Viral Proteins
chemical_list: D014764:Viral Proteins