Imps chief executive Liam Scully says the club will support Michael Appleton as he takes a short break from his duties to recover from surgery.
Appleton will take a break of around 10 days following an operation scheduled for Wednesday to remove a cancerous tumour.
Scully said: “It goes without saying that the most important thing is Michael’s health, and we’ll provide whatever support we can. Football is our secondary concern at times like this.
“He will want to be back as soon as possible but I wish to be clear that he will be given as much time off as he needs and we absolutely do not want to see him back until he is ready.
“Plans for the new season are well underway, Michael has driven them and they’ll continue on track. We are all looking forward to the new season and are right behind Michael, on and off the pitch.”