Now of course it is possible that this was deliberate and some pesky so-and so is being a bit clever... but even so, it's still crap enough to warrant inclusion.
Thanks to Carla, who writes: 'While looking through a patient's chart I ran into this typo.' Apparently it's supposed to say 'disk'. Poor old bugger's in a seriously bad way. As long as someone's getting a smile out of it though, eh?