The ERBB3 levels in the CHDD group (devils 9, 10, 11 and 12) ranged from <30–220 pg/ml all had a small isolated dermatopathy such as abscess (devil 9), pyogranuloma (devil 10), skin tag with associated inflammation (devil 11) and small focus of dermatitis (devil 12) all recorded a low serum ERBB3 levels of <92 pg/ml. Here, ERBB3 is linked to dermatitis.