Dacarbazine and bevacizumab improved paraneoplastic doege–potter syndrome of malignant solitary fibrous tumor

Solitary fibrous tumors (SFTs) are rare soft-tissue tumors that often occur in body cavities, especially the pleural space. A subset of SFTs is histologically malignant and tends to metastasize; rarely, they may induce paraneoplastic syndromes. Doege–Potter syndrome is paraneoplastic hypoglycemia induced by oversecretion of unprocessed insulin-growth factor-2. While localized SFTs are treated mainly by surgery, the standard therapy for metastatic SFTs is lacking. Here, we present a case with metastatic malignant SFT and Doege–Potter syndrome, which was treated initially by dacarbazine and bevacizumab with a period of good clinical response.