Taking a break from MOGA infusions to have a hip replacement. Has anyone else been in this position? What did you do?

Hi, I have a form of Non-Hodgkins Lymphoma called Sezary Syndrome and have regular fortnightly  immunotherapy infusions of a drug called Mogamulizumab (MOGA for short). This is not a cure but for the moment  keeps my cancer under control though the downside is that it supresses my immune system.  Unconnected with the cancer, I have an arthritic hip which has reached the point of needing a hip replacement operation.  To have the op I will need to stop my MOGA infusions for maybe as long as two months to build up my immune system in case I get an infection during the operation.  I'm in pain with the hip and would like to have the replacement operation but I am worried about stopping my MOGA in case it leads to a resurgence of my Sezary Syndrome.  Any one had any similar experience?  Got any thoughts please?