Radiation-associated synovial-sarcoma: clinicopathological and molecular analysis of two cases.
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in Modern Pathology : An Official Journal of the United States & Canadian Academy of Pathology, Inc (2002), 15(9), 998-1004
Development of a soft-tissue sarcoma is an infrequent but well-known long-term complication of radiotherapy. Malignant fibrous histiocytomas, extraskeletal osteosarcomas, fibrosarcomas, malignant ... [more ▼]
Development of a soft-tissue sarcoma is an infrequent but well-known long-term complication of radiotherapy. Malignant fibrous histiocytomas, extraskeletal osteosarcomas, fibrosarcomas, malignant peripheral nerve sheath tumors, and angiosarcomas are most frequently encountered. Radiationassociated synovial sarcomas are exceptional. We report the clinicopathologic, immunohistochemical, and molecular features of two radiationassociated synovial sarcomas. One tumor developed in a 42-year-old female 17 years after external irradiation was given for breast carcinoma; the other occurred in a 34-year-old female who was irradiated at the age of 7 years for a nonneoplastic condition of the left hand. Both lesions showed morphologic features of monophasic spindle cell synovial sarcoma, were immunoreactive for cytokeratins, epithelial membrane antigen, CD99, CD117 (c-kit), and bcl-2 and bore the t(X;18) (SYT-SSX1) translocation. We conclude that synovial sarcoma has to be added to the list of radiation-associated soft-tissue sarcomas. Mod Pathol 2002;15(9):998–1004 [less ▲]Detailed reference viewed: 16 (1 ULg)
A case of spermatic cord liposarcoma
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Conference (1998)Detailed reference viewed: 16 (0 ULg)
(E)-2'-Deoxy-2'-(Fluoromethylene)cytidine potentiates radioresponse of two human solid tumor xenografts.
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in Proceedings of the American Association for Cancer Research (1998)
Antitumor and radiosensitizing effects of (E)-2'-deoxy-2'-(fluoromethylene) cytidine (FMdC), a novel inhibitor of ribonucleotide reducÃase, were evaluated on nude mice bearing s.c. human C33-A cervix ... [more ▼]
Antitumor and radiosensitizing effects of (E)-2'-deoxy-2'-(fluoromethylene) cytidine (FMdC), a novel inhibitor of ribonucleotide reducÃase, were evaluated on nude mice bearing s.c. human C33-A cervix cancer and I -H7 MG glioblastoma xenografts. FMdC given once daily has a dosedependent antitumor effect. The maximum tolerated dose in the mice was reached with 10 daily i.p. administrations of 10 mg/kg over 12 days. In the case of radiotherapy (RT) alone (10 fractions over 12 days), the radiation dose required to produce local tumor control in 50% of the treated C33-A xenografts was 51.0 Gy. When combined with FMdC, the radiation dose required to produce local tumor control was reduced to 41.4 and 38.2 Gy, at respective doses of 5 and 10 mg/kg given i.p. l h before each irradiation. The corresponding enhancement ratios (ERs) were 1.2 and 1.3, respec tively. In U-87 MG xenografts, when 5-20 mg/kg FMdC combined with 30 or 40 Gy of RT, the combination treatment produced a significantly increased growth delay as compared with RT alone (P Â£0.002). The ERs of 5, 10, and 20 mg/kg FMdC at a dose of 30 Gy were 2.0, 1.4, and 1.8, respectively. At the 40-Gy level, ERs of 10 and 20 mg/kg FMdC were 1.4 and 1.7. When FMdC was combined with 50 Gy of RT, an increased long-term remission rate of 80-88.9% was observed, as compared with 25% for RT alone (P <0.05). FMdC produced moderate myelosuppression in the mice bearing cervix cancer, whereas leukocytosis occurred in the mice bearing glioblastoma at a low dose. Slightly increased skin toxicity (only with U-87 MG tumor) was observed, as compared with RT alone. In conclusion, FMdC is a potent cytotoxic agent and able to modify the radiation response of C33-A and U-87 MG xenografts. [less ▲]Detailed reference viewed: 26 (0 ULg)