Overview of other studies included in the systematic review

Author, yearStudy typePrimaryPatientSRTSystemic therapyNon-target responseCriteria
Welsh et al. [74], 2019Prospective monocentricVarious, mainly NSCLC28/106 (26%)50 Gy/4 fx or 60 Gy/10 fx to liver or lung mtxsIpilimumab26% rates of clinical benefit of non-irradiated tumor volumeResponse outside the RT field
Menon et al. [75], 2019Prospective monocentricVarious16/26 (62%)VariousITPR/CR in 58% of low-dose lesions versus 18% of no-dose ones (P = 0.0001)Response outside RT field
Tubin et al. [76], 2019Retrospective monocentricVarious22/60 (37%)VariousNone43% AE, 20% BEResponse outside RT field
Woody et al. [77], 2022Retrospective monocentricVarious, mainly NSCLC0/125 (0%)60 Gy/8 fx to primaryNoneNoneNR
Damen et al. [78], 2022Retrospective monocentricVarious2/11 (18%)NRITNRTemporal
Zagardo et al. [79], 2024Retrospective monocentricVarious0/28 (0%)30 Gy (18–50)/5 fx (1–5)ITNoneResponse outside RT field
Chang et al. [80], 2024Prospective monocentricVarious10/26 (39%)Ipilimumab/Nivolumab38.5% (50% in the nivolumab group)Response outside RT field with SRT-IT > IT without SRT
Zafra et al. [81], 2024Prospective multicentricVarious, mainly lung5/14 (36%)24–35 Gy/3–5 fx to mainly lung mtxsIT36% in cohort A (IT + SBRT)Response outside RT field
Mizumatsu and Nomura [82], 2023Case reportDLBCL75*, M21 Gy/3 fx to frontal boneNoneCR on orbital and temporal boneNegligible dose, no concomitant systemic treatment
Feng et al. [83], 2022Case reportGiant cell tumor of bone37*, F44 Gy/4 fx to 3 lung mtxNonePR with 22.2% reduction of a 4th lung mtxNo concomitant systemic treatment
Callaghan et al. [84], 2020Case seriesSarcomaNR24 Gy/3 fx on tumor bed recurrenceNeoadjuvant (2 cycles), concomitant, adjuvant pembrolizumab (tot 26)PR on a bladder metastatic lesion 8 months after, with no PD after 20 monthsTemporal

* Age at time of SRT. DLBCL: diffuse large B-cell lymphoma; NR: not reported; mtxs: metastases; mtx: metastasis; fx: fraction(s); IT: immunotherapy; PR: partial response; CR: complete response; AE: abscopal effect; BE: bystander effect; SBRT: stereotactic body radiotherapy; PD: progression disease; RT: radiation treatment; SRT: stereotactic radiation techniques; NSCLC: non-small cell lung cancer; F: female; M: male; tot: total