Median age of diagnosis - 15 years [MISCELLANEOUS] Caused by mutation in the dyskerin gene (DKC1, 300126.0001) [MOLECULAR BASIS] HHS is a more severe variant, often resulting in death in childhood [MISCELLANEOUS] Median age of onset of pancytopenia - 10 years (range 1-32 years) [MISCELLANEOUS] Median age of onset of leukoplakia - 7 years (range 1-26 years) [MISCELLANEOUS] Median age of onset of pigmentation - 8 years (range 1-15 years) [MISCELLANEOUS] Median age of onset of nail dystrophy - 7 years (range 1-6 years) [MISCELLANEOUS] Classic triad consists of nail dystrophy, skin hyperpigmentation, and mucosal leukoplakia [MISCELLANEOUS]
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