Death came for him

I was standing in my parents' room, talking to my very sick dad at the time. He was dying of stage 4 esophageal cancer. I got the feeling something was behind me. I looked towards the doorway to the living room and something about 4'6 and fully black is peeking around the corner, with its hands on the door frame. I ran towards it, and it slipped back around the door. When I got outside the doorway, there was nothing. My dad was completely confused when I step back inside the room when I tell him. People who stayed at my house in my dad's final days claimed to have seen it. My mom saw the figure on multiple occasions in multiple places until he passed away. We haven't seen it since.