I love this guy and hate what he's going through right now. If you're reading this you probably know exactly who he is, but in case you don't know he portrayed Ash in the legendary Evil Dead series among a lot of other films.
it could be myelofibrosis, i meant mycosis fungoides, despite the name it isnt fungal. its the late stage symptom(the tumor looks like a fungus) a rare t-cell lymphoma, usually found in older aged white men(most of the time), it takes a long time(most of the time) to enter into a different stage.
MF looks eczema, allergy patches initially(but there are something unusual that usually is best discussed with a dermatologist)