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International Journal of Trichology International Journal of Trichology
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CASE REPORT
Year : 2022  |  Volume : 14  |  Issue : 4  |  Page : 138-140

Transient rectangular alopecia after endovascular embolization: A case series of four patients describing dermoscopic and histopathologic findings


1 Department of Dermatology, University Hospital of La Princesa, Madrid, Spain
2 Department of Anatomic Pathology, University Hospital of La Princesa, Madrid, Spain
3 Department of Medical Physics and Radiation Protection, University Hospital of La Princesa, Madrid, Spain
4 Department of Head of Interventional Neuroradiology, University Hospital of La Princesa, Madrid, Spain

Correspondence Address:
María Herrero-Moyano
Department of Dermatology, University Hospital of La Princesa, Calle Diego de Lóon 62, Madrid
Spain
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijt.ijt_172_20

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Transient rectangular alopecia after endovascular embolization (TRAEE) is considered a specific form of radiodermatitis that is probably underreported in the literature. We present a case series of four patients from our hospital describing dermoscopic and histopathologic findings. Dermoscopic findings overlap with those of alopecia areata; therefore, TRAAE may be misdiagnosed without a precise history. Histopathology analysis of one of our cases showed different characteristics from the only report in the literature (high proportion of follicles in telogen phase). Initial reports considered that total radiation doses between 3 and 5 Gy produced TRAEE, whereas doses higher than 7Gy could trigger permanent alopecia. However, one of our patients exposed to a total dose of 7.6 Gy had complete hair regrowth.


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