Abstract
The sonographic characteristics of frontal fibrosing alopecia have been scarcely studied. The aim of this study was to perform a colour Doppler ultrasound evaluation in frontal fibrosing alopecia. A cross-sectional study including 99 women with frontal fibrosing alopecia and 40 control subjects was performed using ultrasound equipment with a lineal 18MHz probe. Three areas were evaluated per patient: the alopecic area (a), the hairline implantation area (b) and healthy scalp (c). The diameter (cm) and flow (m/s) of the two most significant vessels were recorded. With regard to the hairline implantation area, patients presented higher vessel diameter (0.127cm vs 0.103cm, P=.03) and vessel flow (8.183m/s vs 7.670m/s, P=.05) than the control group. Vessel diameter was higher in the healthy scalp area in patients than in the control group (0.088cm vs 0.078cm, P=.03). Patients presented higher vessel diameter and flow in the hairline implantation area compared to the control group.
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