Wakefield Wildcats have revealed that prop Richard Moore is suffering from Crohn's disease, but insist his career is not over.
Crohn's disease is a chronic condition which causes stomach pains, diarrhoea and weight loss and typically affects the intestines.
Its cause is unknown and there is no cure but symptoms can be treated and sufferers can enjoy long periods of remission.
Moore has been losing weight during the close season and Wakefield were desperate to get to the bottom of the medical mystery.
After a series of tests, it has now been discovered that Crohn's disease is the cause of the problems, and they are confident that now he has been diagnosed Moore can start to get the right treatment.
The Wildcats released a statement on Wednesday to clarify the 27-year-old's condition.
"Although a very serious illness, Richard and the club view this diagnosis in a very positive manner as it now means medication can be used to bring the condition under control," read a club statement.
"Once this treatment has been carried out Richard can once again recommence his Super League career at Wakefield Trinity Wildcats."
Moore joined Wakefield in 2007 after previous stints with Leigh, London Broncos and Bradford, and he was the subject of moves from Wigan during the off-season.