Crowds of well-wishers greeted King Charles III in his first official public appearance since being diagnosed with cancer after doctors said they were "very encouraged" by the progress of his treatment, AFP reported.
The British head of state and his wife, Queen Camilla, toured University College Hospital's Macmillan Cancer Center in central London, which diagnoses and treats a wide range of cancers.
Charles, 75, is patron of Cancer Research UK and Macmillan Cancer Support, and Camilla, 76, is president of Maggie's, another cancer support charity.
The couple smiled and waved to the crowds before heading inside to meet medical professionals, patients and their families.
Charles suspended most of his duties in February after the cancer was discovered while he was being treated for an enlarged prostate the previous month.
The exact nature of his cancer was not disclosed.
His sister-in-law Catherine, the 42-year-old Princess of Wales, underwent abdominal surgery in January and announced in March that she was undergoing chemotherapy.
Again, no details were given on what type of cancer she has. Kate, as she is widely known, is married to Charles' elder son and heir Prince William. /BGNES