Award-winning comedian Katherine Ryan has revealed she has been diagnosed with skin cancer for a second time. The Canadian-born star, 41, shared the news on her podcast Telling Everybody Everything and social media, explaining that she recently had a cancerous mole removed from her arm. She is set to undergo another procedure next week to ensure the melanoma has been fully excised. Ryan previously battled skin cancer in 2004 while studying in Toronto, when doctors removed a “golf ball-sized” lump from her thigh. This time, her concerns were initially dismissed by a doctor, who reassured her that the mole was…