In a statement, Mowbray said: “Following my recent LMA Health Assessment I have received a medical diagnosis that will require me to receive treatment. Undergoing treatment will necessitate that I temporarily step away from the Technical Area as Manager of Birmingham City Football Club.
“Until I return, my assistant manager, Mark Venus, will take temporary charge of the team, supported by coaches Ashley Cole, Pete Shuttleworth and Maik Taylor. I will continue to provide advice and counsel while undergoing treatment.
“The Club has been incredibly supportive of me and my family and we are very grateful. I know that everyone will be respectful of our privacy at this time.”
Mowbray has guided Birmingham to four wins from eight Championship matches since his appointment at St. Andrew’s.
On Saturday he secured a 2-1 win over former club Sunderland, who controversially dismissed him in December.
Birmingham’s chief executive Garry Cook said: “Our thoughts are with Tony, his wife Amber, and family. We wish him a speedy recovery and look forward to welcoming Tony back to the Club to continue the excellent work that he has started.
“In the meantime, Mark Venus, Ashley Cole, Pete Shuttleworth and Maik Taylor, will be given all the support they need to lead the Club forward.”
Birmingham return to league action this weekend with a trip to Ipswich, the club where Mowbray made over 120 appearances.
