A press statement reads:
"Lorna was diagnosed with breast cancer in 2012 and finished her last treatment of chemotherapy in 2013. She has been clear for the last two years. Sadly, it has now returned. Lorna has now been advised by her medical team that she requires further treatment and extensive surgery. Consequently, Lorna will be returning to her home in the USA to undergo the necessary medical procedures. The tour, which opened in Edinburgh in May, will now finish at the Theatre Royal, Brighton on 11 July. Subsequent dates in Watford, Bromley, Darlington, Oxford and Woking have been cancelled."
David King (producer) said: "I am shocked and saddened by this news. Lorna is an incredible performer , and she lights up the stage at every performance. We wish her a full recovery from her surgery and hope and pray that her breast cancer will be gone forever."
Writing on Twitter, Louise Dearman said: "So as many of you have heard, sadly our tour is closing early on 11th July. The most important thing is that we all wish my dear friend Lorna Luft a very quick recovery and send her positivity and love at this difficult time."
Ray Quinn added: "It's been an absolute joy and pleasure to work with all of you from The Songbook of Judy Garland and Lorna Luft sending all my love and support."
West End Frame sends love and support to Lorna and her family