Trẻ em có hạch cổ là bệnh gì?
(SK&ĐS) - Con trai tôi được 4 tuổi, cách đây một vài hôm tôi thấy bên phải cổ (phía dưới tai) của cháu xuất hiện một hạch to bằng hạt đậu đen. Xin hỏi quý báo có hạch cổ như vậy có nguy hiểm không?
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