Depersonalization and Self Infliction:
I've added some Self Infliction links here along with DP/DR links, as sometimes a person with DP/DR has the SI components that is first more "tangible" upon discovery.
Excellent personal description with extensive information http://www.dreamchild.net/
Diagnoses associated with Self Infliction/Depersonalization... scroll down to read it all. http://www.palace.net/~llama/psych/diag.html
Tomography study of DP. Interesting! http://ajp.psychiatryonline.org/cgi/content/abstract/157/11/1782
Self injury http://www.palace.net/~llama/psych/injury.html