[Electron microscopy of blood vessels in alopecia areata].

The use of electron microscope in the study of the diseased skin of four patients with Alopecia areata has detected changes in the endothelial cells with narrowed capillary lumen. The authors have brought these findings in connection with the decreased blood circulation in lesions of patients with Alopecia areata which necessiates the use of vasodilatator agents in their therapy. Etiopathogenesis of the disease has been discussed.