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例1男,49岁。全身散在棕褐色斑点16年余。每于喝啤酒后出现奇痒,色素加深,数目增多。全身健康状况良好,无阳性家族史。体检:系统检查无异常发现。躯干及双
Example 1 Male, 49 years old. The body scattered in tan spots for more than 16 years. Every time after drinking beer there is itchiness, pigmentation deepens, and the number increases. The body is in good health and there is no positive family history. Physical examination: No abnormal findings in the system examination. Torso and double