Fig. 2.
Gross and microscopic findings. (A) The gross specimen with a well-defined multilobulated cyst filled with blood clots. (B) Atypical spindle cells with pleomorphic nuclei and frequent mitotic figures (H&E stain, ×200). (C) Large stellate cells containing eosinophilic cytoplasmic granules positive for PAS (PAS, ×400).