女孩,5岁。3岁时出现右侧乳腺小硬结,有触痛。半年后自行消退。现又出现左侧乳腺的小硬结,骨龄相当于5岁。该患儿可能为()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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