SNP MSP Ruth Maguire revealed yesterday that she has been diagnosed with stage three cervical cancer NICOLA Sturgeon was among Scotland’s politicians to send warm wishes to SNP MSP Ruth Maguire who revealed yesterday that she has been diagnosed with stage three cervical cancer. Writing on Twitter, the First Minister said: “Sending love and strength to Ruth Maguire and her family – everyone in the SNP is thinking of you.” SNP MP Amy Callaghan also sent her heartfelt wishes after she experienced her own health battles. Callaghan, the MP for East Dunbartonshire, was diagnosed with melanoma when she was 19 and has been cancer-free since 2014.