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Updated: Mar 8, 2026

A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
Published on: March 9, 2015
Late-onset alopecia areata: descriptive analysis of 30 cases
Rosana Lazzarini1, Camila Bilac Oliari1, Ana Luisa Nasser Erthal1
1Irmandade da Santa Casa de Misericórdia de São Paulo - São Paulo (SP), Brazil.
Abstract:
Alopecia areata is an autoimmune disease characterized by non-scaring hair loss. The onset in over 50-year-old patients is rare and has barely been studied. Cases of this disease have been retrospectively analyzed - according to clinical forms, extension, and associated diseases - to assess alopecia areata characteristics in a group of patients whose disease onset was after the age of 50. 30 patients were studied; a few of them presented with autoimmune-related diseases or family history. The disease onset after the age of 50 seems to have different characteristics from those found in young people.
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