Also not an oncologist but this might be relevant:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4809375/In any case, this is an excerpt from the end: "LC in adults with ALL usually predicts an accelerated disease progression with worse prognosis, as studies indicate a survival rate of approximately of 15% at 6 months after its recognition."
So if that's correct, then it doesn't look good unfortunately :( If this is someone close to you, then I hope they're in the 15% that survives. Better yet, I hope I'm wrong and that this info doesn't apply to this person and that their odds might actually be better than this. Either way, good luck OP and wishing you and your friend all the best.