F15 IATROGENIC TRAUMATIC NONSCARRING ALOPECIA AFTER PROLONGED EEG/VIDEOMONITORING AND PROLONGED OPERATION
Schauder S1, Tergau F2
Department of Dermatology1, Department of Clinical Neurophysiology2, University of Göttingen, Germany

A 50-year-old man experienced delayed patchy hair loss after prolonged EEG monitoring. A number of 26 very closely spaced electrodes had been applied at the International 10-20 and 10/10 locations. Electrodes were held in place by 1.5 x 2.0- cm pieces of collodion soaked gauze. After monitoring, electrodes were removed with acetone. Some hard remnants of collodion remained in the hair above the left ear, which the patient tried to remove. After 2 days he developed alopecia in this area and some days later he developed another 9 patches of alopecia corresponding to electrode sites. Complete regrowth of hair was seen two months later. The patient had not experienced similar hair loss previously. The alopecia was probably induced by prolonged pressure and local massage from the electrodes combined with hair pulling during placement and removal of the electrodes. An 18-year-old man underwent removal of a juvenile angiofibroma in the left nostril. His head was placed on a horseshoe shaped gel cushion for 9 hours. Four weeks after surgery linear alopecia following the maximal pressure of the gel cushion developed on the parieto-occipital region of the scalp. Hair regrowth was noticed 2 months thereafter. A 17-year-old man had surgery of a fractured cervical vertebra. Therefore he was immobilized for 5 hours in a halo ring with fixation points above the ears. Ten days later 2 symmetrical patches of alopecia were observed above the ears. Hair regrew within 6 weeks. The head of a 56-year-old woman requiring plastic surgery of the urethra and was placed for 5 hours on a doughnut shaped rubber ring. Right after the operation she had a painful edema on the vertex area. Five days later she developed linear alopecia following the maximum pressure of the ring. Hair regrew within 8 weeks.