Re-irradiation using proton therapy for radiation-induced secondary cancer with Li-Fraumeni syndrome: A case report and review of literature

Tomoya Iwasaki, Masashi Mizumoto, Haruko Numajiri, Yoshiko Oshiro, Ryoko Suzuki, Kyoko Moritani, Mariko Eguchi, Eiichi Ishii, Hideyuki SakuraiJournal of Cancer Research and Therapeutics 2020 16(6):1524-1527 Li-Fraumeni syndrome (LFS) is a genetic disease that is hypersensitive to radiotherapy. Proton therapy (PT) was strongly recommended for pediatric and radiation-sensitive tumors. However, there is little information on PT for LFS. The patient was a 7-year-old girl with LFS who was diagnosed with radiation-induced right shoulder blade osteosarcoma and left chest wall malignant fibrous histiocytoma. Both tumors were in the area that had previously been irradiated (36–45 Gy by photon radiotherapy). Sixty-six GyE in 30 fractions was planned for both tumors. We set the clinical target to the minimum gross tumor volume. To comprehensively assess any adverse events, PT was conducted under hospital administration. Cisplatin was used as simultaneous combination chemotherapy. Although administration of granulocyte-colony stimulating factor was necessary for myelosuppression by chemotherapy, PT was completed without interruption. Acute radiation toxicity was observed as Grade 1 dermatitis. The dermatitis became exacerbated 2 weeks after PT but subsequently improved with conservation treatment alone. Twenty-three months after PT, magnetic resonance imaging showed an increase in the tumor on the right shoulder. A histological examination was not conducted as the family de...
Source: Journal of Cancer Research and Therapeutics - Category: Cancer & Oncology Authors: Source Type: research