A case is reported of a patient whose hair suddenly appeared to have turned white. As the disease progressed, he developed patches of complete hair loss, which established the diagnosis of alopecia areata.
Helm F, Milgrom H. Can Scalp Hair Suddenly Turn White?A Case of Canities Subita. Arch Dermatol. 1970;102(1):102-103. doi:10.1001/archderm.1970.04000070104016