最終更新日：2025/11/28
The pediatrician reassured the parents that the blue-gray patch on their newborn's lower back was a Mongolian spot, a benign flat congenital birthmark that typically fades by puberty.
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The pediatrician reassured the parents that the blue-gray patch on their newborn's lower back was a Mongolian spot, a benign flat congenital birthmark that typically fades by puberty.
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