Plica neuropathica in severe reactive depression: clinical and trichoscopic features.

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Plica neuropathica (PN), also known as plica polonica, felting, matting or bird's nest hair, is an acquired hair condition in which hair becomes twisted, leading to the formation of a compact mass. Psychiatric disorders are an important etiologic factor for PN. We report a case of PN in a woman with severe reactive depression and present the trichoscopic findings.