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Phenotypic features of FA. (A) Hypoplastic thumbs in an 11-year-old. (B) Hypopigmented (white arrow) and hyperpigmented (black arrows) skin lesions on the trunk of an adolescent. Photograph courtesy of Susan J. Bayliss M.D. (C) Progressive aplastic anemia in a 20-year-old with FA. Most of the marrow space is occupied by fat.
