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In page Melanie Appleby:

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In 1985, prior to the duo's recording career, Mel was treated for malignant paraganglioma, a form of cancer, on her liver. By January 1987, Mel was experiencing back problems, delaying the filming of the "Respectable" music video. During a promotional visit to Japan in June 1987, Mel's back pain worsened, rendering her unable to perform, and she returned to the UK in a wheelchair. A recurrence of the cancer was detected in Mel's spine after undergoing tests at St Bartholomew's Hospital. The sisters withdrew from the public life while Mel underwent treatment, trying to keep the diagnosis secret from the public and many colleagues. The terminal cancer diagnosis was revealed to the public when a journalist called at her house, pretending to be a nurse.[citation needed]