Mehregan A H, Thompson W S
Br J Dermatol. 1979 Mar;100(3):315-22. doi: 10.1111/j.1365-2133.1979.tb06205.x.
A patient with cleidocranial dysostosis developed extensive pili multigemini over the heavily bearded chin and cheek areas. Histological examination of serial sections revealed complicated follicular structures forming from two to as many eight hair shafts. Each hair is formed by a single branch of dermal papilla which is surrounded by all layers present in a normal follicle except for the outer root sheath cells. The outer root sheath surrounds the entire follicle. Irregularities in configuration of the hairs, longitudinal grooving and areas of bifurcation and re-adhesion of the hair shafts are demonstrated.
一名锁骨颅骨发育不全患者在胡须浓密的下巴和脸颊区域出现了广泛的多生毛发。连续切片的组织学检查显示，复杂的毛囊结构由两到八个毛干形成。每根毛发由单个真皮乳头分支形成，除外根鞘细胞外，其周围环绕着正常毛囊中的所有层。外根鞘围绕着整个毛囊。毛发的形态不规则、纵向沟纹以及毛干的分叉和重新粘连区域均有显示。
