患儿，女，11岁。近5年来左侧腮腺反复肿胀，间隔1-2个月发作1次。有助于明确诊断的检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29988' and id < 2430214 and id<>'2430214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29988' and id > 2430214 and id<>'2430214' order by id asc limit 5