I also watch my ALP closely, but — in case anyone's nervous — as a layperson I understand that it's a non-specific indicator, so rising ALP doesn't necessarily mean your cancer's spreading

My ALP was initially borderline-high after spinal surgery (and the drilling and insertion of rods to keep my spine from collapsing), then came down to lowish normal as the bones healed. ALP can also spike with normal bone stresses and fractures, celiac disease, liver disease, or even pregnancy (not too relevant here 🙂).