The brief review of Addissons disease didn't throw up much that I wasn't already very familar with, and if you're revising for part 2 chances are you're already fairly close buddies with it too.
Waterhouse Friederchsen Syndrome: bilateral adrenal haemorrhage, usually secondary to meningococcal sepsis but can also be due to sepsis caused by strep, staph or h.influenzae.
Should you feel the need for a more comprehensive recap of Addisons disease please click here for wiki's take on it.