evidence has been obtained of deposition of complement component c1q in mast cells , by the immunofluorscence technique , using biopsy specimens from the scalp from 5 of 7 normal subjects and 14 of 17 patients with alopecia areata and also from skin lesions of 1 of 2 patients with urticaria pigmentosa studied .
C0024880
mast
C0042111
urticaria pigmentosa