reading down a month (assuming anybody ever has/will read this mess) you will see the first references to The Thing that the doctor removed, and was benign, but which looked like menanoma.
He came after me with a knfe! A KNIFE!!!
since then, I have occasionally noticed several other wonderfully round, full-bodied bruises about a half-inch in diameter, which fade out in a week or two. a mystery indeed.
and I now have the answer. after the last heart attack, they put me on the new (read: expensive) antiplatelet medicine prasrugel (Effient, or as I call it, 'Effing-ient.) that and a baby aspirin take me to the edge of looking like I got mugged if I sleep on my arm overnight.
that and a mild squeeze from the killer-clawed cat yield little bleeders that very slowly leak for half a day.
followed in a couple days by the mystery bruises. I'm being mugged by a zoned-out lovecat.