Mark Welland, 61, says he was incorrectly diagnosed with a cancerous pancreatic lump and underwent keyhole surgery at the Royal Marsden Hospital in west London in October 2020. According to the report, oncologists told him the lump was cancerous, leading to the surgical procedure. Welland is now taking legal action against the hospital, arguing that the operation removed cancer that he did not have. The account describes the initial diagnosis, the subsequent surgery, and the hospital being the defendant in his claim. The provided sources do not include the hospital’s response, court filings, medical findings after the procedure, or details of the legal basis for the lawsuit. They also do not state whether an independent review has confirmed the absence of cancer. The report focuses on the allegation that the diagnosis was wrong and that the patient suffered consequences from surgery performed on that basis.