United Kingdom, July 31 -- Khloe Kardashian hid her first melanoma diagnosis from her family following her dad Robert Kardashian's death.

Attorney and businessman Robert - who was also father to Kourtney Kardashian, 46, and Kim Kardashian, 44, and Rob Kardashian, 38, whom he had with ex-wife Kris Jenner, 69 - died in September 2003, aged 59, two months after he was diagnosed with cancer in his esophagus, when Khloe was aged 19.

Shortly after Robert's sudden death, Khloe found out she had melanoma - the most dangerous type of skin cancer, which is primarily caused by ultraviolet (UV) radiation from the sun or sunbeds - but she kept it a secret because she "didn't want to worry anyone" amidst her family's grief.

Speaking on the latest ep...