Tsugumasa Kamata1,2, Hiroyuki Sakurai3, Kazuo Nakagawa1, Shun-ichi Watanabe1, Koji Tsuta2, Hisao Asamura4. 1. Division of Thoracic Surgery, National Cancer Center Hospital, 1-1 Tsukiji 5-chome, Chuo-Ku, Tokyo, 104-0045, Japan. 2. Division of Pathology and Clinical Laboratories, National Cancer Center Hospital, Chuo-Ku, Tokyo, Japan. 3. Division of Thoracic Surgery, National Cancer Center Hospital, 1-1 Tsukiji 5-chome, Chuo-Ku, Tokyo, 104-0045, Japan. hsakurai@ncc.go.jp. 4. Department of Surgery, Division of General Thoracic Surgery, School of Medicine, Keio University, Shinjuku-Ku, Tokyo, Japan.
Abstract
PURPOSE: We attempted to identify the exact point of tumor eruption of a solitary fibrous tumor of the pleura (SFTP). METHODS: We morphologically classified 36 SFTPs into 5 categories. Type A showed a connection that included a bloodstream with the pleura on both sides. Type B only showed a connection that included a bloodstream with the visceral pleura, and had a non-bloodstream connection with the parietal pleura. Type C only showed a connection that included a bloodstream with the visceral pleura, and had no connection with the parietal pleura. Type D showed a non-bloodstream connection with the visceral pleura, and only showed a connection that included a bloodstream with the parietal pleura. Finally, type E had no connection with the visceral pleura, and only showed a connection that included a bloodstream with the parietal pleura. The clinicopathological profiles of the tumors were investigated according to their type. RESULTS: The distribution of the 36 SFTPs was as follows: A (19 %), B (6 %), C (67 %), D (0 %) and E (8 %). The tumors categorized as type A tended to be large in size. CONCLUSIONS: SFTPs commonly arise from the visceral pleura and in accordance with tumor progression they will form a non-bloodstream connection with the parietal pleura. Finally, a vascular pedicle will arise with the parietal pleura.
PURPOSE: We attempted to identify the exact point of tumor eruption of a solitary fibrous tumor of the pleura (SFTP). METHODS: We morphologically classified 36 SFTPs into 5 categories. Type A showed a connection that included a bloodstream with the pleura on both sides. Type B only showed a connection that included a bloodstream with the visceral pleura, and had a non-bloodstream connection with the parietal pleura. Type C only showed a connection that included a bloodstream with the visceral pleura, and had no connection with the parietal pleura. Type D showed a non-bloodstream connection with the visceral pleura, and only showed a connection that included a bloodstream with the parietal pleura. Finally, type E had no connection with the visceral pleura, and only showed a connection that included a bloodstream with the parietal pleura. The clinicopathological profiles of the tumors were investigated according to their type. RESULTS: The distribution of the 36 SFTPs was as follows: A (19 %), B (6 %), C (67 %), D (0 %) and E (8 %). The tumors categorized as type A tended to be large in size. CONCLUSIONS: SFTPs commonly arise from the visceral pleura and in accordance with tumor progression they will form a non-bloodstream connection with the parietal pleura. Finally, a vascular pedicle will arise with the parietal pleura.