Based on the context and the answer, generate a question. 

Context: A blood test freaked me out . So when they took what felt like 2 gallons of my blood , I was getting a little bit nervous . So I pushed the doctor until he finally told me what he thought the problem was . He told me that because of the rapid weight loss and growth , that it was most likely an aggressive form of Leukemia .

Answer:

Because they were suffering from Leukemia .



Why had the narrator rapidly lost weight ?