Abstract
We report 4 cases of solitary fibrous tumor of the pleura (SFT), focusing on their malignant potential. All 4 SFTs were removed by video-assisted thoracic surgery. Two SFTs demonstrated pedunculated attachment to the pleura, while the other two were not pedunculated. Three SFTs arose from the visceral pleura, and the other from the parietal pleura. Only one SFT (case 4), a pedunculated tumor arising from the visceral pleura, seemed to have a malignant potential based on its higher cellularity and increased vascularity. The tumor cells demonstrated a higher Ki67 labeling index, but were not immunoreactive for CD34. None of the 4 SFT cases showed recurrence after complete surgical excision.
