[Malignant recurrence of solitary fibrous tumor of the pleura developed 20 years after the surgery: a case report of re-extirpation].

A 63-year-old female developed the chest wall tumor protruding into the right thoracic cavity. She consulted our hospital complaining of chest pain. 20 years before this episode, she had undergone tumor extirpation combined with the partial resection of adherent anterior chest wall and the diaphragm for large benign solitary fibrous tumor of the pleura. Because of the difficulty in making diagnosis by needle biopsy, operation (re-tumor extirpation combined with the chest wall) was done. Histological examination revealed that the tumor was malignant solitary fibrous tumor. We concluded that the tumor was the malignant recurrence of the benign solitary fibrous tumor resected 20 years before. Occasionally, benign solitary fibrous tumor of the pleura recurs and behaves more aggressively than primary, but such a long latent period as 20 years is quite uncommon. So we present the case and the review of the literature.