has part has part has_part characteristic of part of has modifier abnormal hair follicle bulb morphology abnormal hair follicle matrix region morphology csmith any structural anomaly of the bulb region adjacent to the dermal papilla that contains rapidly proliferating matrix cells that give rise to the various cell lineages of the hair shaft and inner root sheath 2010-10-20T01:29:34Z MPheno.ontology MP:0010686 morphology abnormal hair follicle matrix region