Vocal specialists in the US have said it’s a “miracle” that Hayscastle’s Connie Fisher was ever able to sing as they diagnose her with a vocal cord condition.

The Sound of Music star’s doctor said the condition, known as ‘congenital fusion anomalies’, is not uncommon in general but very rarely heard of in singers.

Connie, 25, now has no option but to undergo surgery in order to have any chance of performing again. Her doctor explained that she would have had the condition since birth and he had never heard of this situation in singers before.

Connie’s management, Bedlam Management Ltd, has already had to cancel her forthcoming 14-date Secret Love tour, which was due to take her across the UK in May and June.

In a statement, they said: “How Connie Fisher has ended up having a career in singing is nothing short of a miracle.

“[She] is obviously very disappointed and upset that she is not able to do the concert tour, but we wish her a full recovery.”

Soon after starting her role as Maria in Andrew Lloyd Webber’s The Sound of Music at the London Palladium, Connie was advised by doctors to cut down the number of shows she performed.

She also needed to take two weeks off after damaging her vocal cords. However, since leaving the musical in 2007 she has managed to record an album and filmed for a role on ITV drama Caught in a Trap.