| They lacked chromogranin A, glial fibrillary acidic protein, vimentin, S-100, and cytokeratin antigen expression. |
| The fibroblasts show pleomorphism, and apparent mitotic activity and a positive immunoreactivity with vimentin are seen. |
| The lesion shows diffuse positivity for CD68 and vimentin, and negativity for smooth muscle actin, desmin, and epithelial markers. |
| Neoplastic cells were positive for vimentin and negative for desmin and actin and showed ultrastructural features typical of fibroblasts. |
| Both spindle cells and ependymal cells were positive for vimentin. |
| Lung biopsies revealed expansion of the interstitium by spindle-shaped cells containing material consistent with glycogen and positive for vimentin. |
