Medical Image Understanding Improves Survival Prediction via Visual Instruction Tuning. - Xixi Liu 001; Jorge Lazo; Andreas Hallqvist; Mikael Johansson; Åse Johnsson; Jonas S. Andersson; Ella Äng Eklund; Patrik Sund; Nasser Hosseini; Jennifer Alvén; Ida Häggström (CoRR, 2026)