late Chadwick Boseman’s cancer diagnosis was kept a close secret, with not even his directors Spike Lee and Black Panther’s Ryan Coogler aware that the 43-year-old had terminal colon cancer.Boseman, who passed away on August 28, only told a handful of people comprising of his close friends and family - as well as his longtime agent Michael Greene, who explained why Boseman decided to keep his four-year illness a secret.According to Greene, the decision was strongly influenced by his mother