Bunina bodies are small eosinphilic granul … Bunina bodies are small eosinphilic granular inclusions that are 1-3 microns in diameter in the anterior horn cells, appearing either singly or in a group. Sometimes they are arranded in small beaded chains. They stain bright red with hematoxylin and eosin (H&E) staining, deep blue with phospotungstic acid hematoxylin and blue with Luxol fast blue. They express cystatin C and consist of electron-dense amorphous material that contains tubules or vesicular structures. The amorphous material frequently includes a cytoplasmis island containing neurofilaments and other micro-organelles. neurofilaments and other micro-organelles.