Veteran French rocker Johnny Hallyday arrived in France on Sunday night to undergo medical tests as part of a legal case to determine whether a surgeon who performed an operation on him in Paris last year was at fault.
Hallyday, 66, who had been due to resume a concert tour in January, was admitted to a Los Angeles hospital on December 7 suffering complications after an operation in Paris.
Shortly afterwards, he began legal action submitting a letter to French judges declaring that he had "come close to death."
A French court designated a neurosurgeon and infectious diseases consultant to determine the cause of ill health for the judicial proceedings, with their report due by July 15.
Hallyday, one of France's most popular entertainers in a career spanning almost 50 years, is known for his energetic live performances.
His health problems have forced the cancellation of the remainder of his concert tour.