I totally forgot that this whole thing is like learning a brand new language.
So, neutropenia is a condition in which your number of neutrophils (a type of white blood cell) drops below 1,000. Below 500, the normal bacteria in your stomach and mouth can make you sick.
Neutropenia happens with systemic chemo often. But with his treatment, the intra-arterial chemo, it only happens about 11% of the time.
The biggest thing is that...the longer his counts are down, the higher his risk of infection/fever, and the longer his normal treatment for cancer is delayed. They can't do an exam or anything until his counts are up. If his counts are still low next week, they will give him medicine to help make more white blood cells...but right now they are hoping his body can recover on his own.