Fig. 2.

(A) Crush cytology smears show sparse cellularity composed of scattered individual cells and a few clusters of eosinophilic cells in bluish mucinous materials in the background. (B) Left: Scattered polygonal cells have abundant vacuolated bluish cells. Note background bluish mucinous materials and solid hyaline materials (arrow). Right: Hyperchromatic round nuclei and lacy cytoplasm with microcysts (arrows). (C) Meningothelial whorls of eosinophilic cells have indistinct cell borders and occasional nuclear hyperchromasia. (D) The vacuolated cytoplasm also shows collagenous hyalinized cytoplasm. (E) Left: Collagen-deposited cells show low nuclear/cytoplasmic ratio. Right: Note refractile and eosinophilic hyaline cytoplasm with feathering off. (F) Calcified materials and collagens are scattered in background.