RT Journal Article SR Electronic T1 Defining Clinical Indications of Proton Beam Therapy at National Level in the Kingdom of Saudi Arabia JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 879 OP 886 DO 10.15537/smj.2019.9.24496 VO 40 IS 9 A1 AlHussain, Hussain A1 Balbaid, Ali A1 Malyapa, Robert A1 AlOthman, Majid A1 Bahadur, Yasser A. A1 Tunio, Mutahir A. A1 Al Asiri, Mushabbab YR 2019 UL http://smj.org.sa/content/40/9/879.abstract AB The Saudi Particle Therapy Centre (SPTC) is establishing proton beam therapy (PBT) services within Kingdom of Saudi Arabia (KSA). Thus, national guidelines for the pertinent draft, and recommendations of PBT for cancer patients are utmost important. Saudi Particle Therapy Centre invited a panel of expert radiation oncologists practicing within KSA to formulate national clinical practice guidelines for the referral, absolute and relative indications and dose/fractionation for PBT. After identifying the key clinical questions, ample search through PubMed, EMBASE, and various search drives was accomplished for appropriate meta-analyses, clinical trials, case-control, and case series studies, and case reports. Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach was incorporated to formulate various recommendations. Saudi Particle Therapy Centre expert panel recommended PBT as utter modality for ocular tumors, base of skull/spine tumors, hepatocellular carcinoma, all pediatric central nervous system (CNS) malignancies, para-nasal sinuses/nasal cavity tumors and for re-irradiation of all sites aimed for cure. However, PBT may be contemplated, as a relative indication if no other parallel option is available, or when photon therapy plans exceed the dose constraints for critical structures. Further, panel did not recommend routine PBT for other sites beyond clinical trials. However, individual oncology patients can be considered for PBT after a multidisciplinary approach and expert’s opinion.