Rhabdomyosarcoma relapse

Hi all.my little girl is 4 and has rhabdo. Relapsed after girst treatment due to cancer growing in her lungs after spine neck and lungs treated with radiotherapy too.not aloud anymore radio or first line treatment so she is on VIR course similiar to VIT. My questions are mainly about nigella sativa and anybody looked into its benefits? Read alot about it in other groups but just wanted to see if anyone had any info.many thanks