Yes . You are correct to say that they will do blood tests for CTC every 21 days .,
Initial test will be done before first injection of Leronlimab than every 21 days will be repeated to see how it is changing , and we hoping that it will be going down.
I read that there maybe single CTC or clusters , clusters producing more often metastasis...
We will see how they will be describing findings , but according to dr NP it is complicated ...