This seems like an accurate anthropomorphic representation of cancer.
The Belgian singer/rapper/songwriter Stromae stars in this haunting video for his song "Quand c'est?" about fighting cancer. In the video, 'cancer' is depicted as spindly, branch-like claws that lurk in the shadows, waiting to attack. Stromae's lean frame adds to the severity of the choreography as he slinks around the empty stage. This eerily beautiful dance paired with the lifelike movements of the 'cancer' animation portray the feelings of struggling with disease, and they also give me the creeps.
Although the video was made to be heavy, it also just really seems like an trailer for a futuristic psychological thriller, especially with the Matrix-y feel towards the end. Hope this doesn't give you nightmares!