Cardiff City have confirmed defender Sol Bamba is suffering from Non-Hodgkin lymphoma.
Bamba, 35, has immediately begun a course of chemotherapy, the club have announced.
He will continue to support his teammates at matches and continue his coaching development within the Bluebirds' academy.
Cardiff said in a statement: "We are saddened to inform supporters that Sol Bamba has been diagnosed with Non-Hodgkin lymphoma.
"With the close support of the Club's medical team, Sol has immediately started a course of chemotherapy treatment.
"Universally admired by teammates, staff and supporters in the Welsh capital, Sol has begun his battle in typically positive spirits and will continue to be an integral part of the Bluebirds family.
"During treatment, Sol will support his teammates at matches and our younger players within the Academy, with whom he will continue his coaching development.
"All future updates on Sol’s progress will be provided only via official Club channels. While we request privacy for him and his family at this time, messages of support to be passed on to Sol may be sent to club@cardiffcityfc.co.uk.
"We are all with you, Sol."
Bamba has been at Cardiff since 2016 having previously played for Leeds and Leicester in the English leagues.
The 46-cap Ivory Coast international has also represented Paris Saint-Germain, Dunfermline, Hibernian, Trabzonspor and Palermo.
