Let's Start With a Challenge

Re-entry after vacation can be hard so I'll start blogging by asking you to do the work with this New England Journal of Medicine challenge.  This patient was brought in by his parents for the odd discoloration on the top of his head.  What is the diagnosis?

1.  Congentital nevus
2.  Psoriasis
3.  Tuberous sclerosis
4.  Vitiligo
5.  Warrdenburg syndrome type II

Post your answer in the