Experimental: Stereotactic Ablative Body Radiation (SABR) and Tumor Treating Fields (TTF)
50 Gy in five fractions SABR (once per day for 5 days) and use of the TTF system for 18 hours per day starting on the first day of SABR and continuing until abdominal disease progression
Radiation: Stereotactic Ablative Body Radiation (SABR)
50 Gy in 5 fractions, once per day for 5 days
Device: Tumor Treating Fields (TTF)
Participant will use the system for at least 18 hours per day starting on the first day of SABR until abdominal disease progression. Short treatment breaks are permitted for personal needs (such as to take a shower) and during radiation therapy. An additional treatment break is permitted for up to 48 hours every 21 days.
Other Name: NovoTTF-100L
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