We had a biopsy done 3 years ago and the 1st Dermotologist said it was Neavous Sebaceous and not to worry. Applied Steriod cream for 2 weeks and seem to heal the oozing & crusty stuff but never went away. 2nd Dermotologist said that it could not possibly be Neavous Sebaceous because there was a hair in the sample area they removed. Now 3 years later she is 10 and it is inflamed, oozing, crusty, painful, and 1.5" in length. We had a 3rd Dermotologist look at it, but he wants to go off the old biopsy results so we are waiting. Can you give me any information?
Even though it is localized - did anyone consider "resistant sebhorreic dermatitis" or even psoriasis of the scalp? Those can sometimes occur very localized and I just had a friend who after years (even as akid) of having it in a small patch - suddenly developed a disseminated case on just onse side of her head and is now with this more apread out version using Lumox mousse as a treatment.
I'd get a new biopsy - it is reasonable to ask for one after 3 years and see if they get a different diagnosis.