患者余×,男。第2胎,第2产,足月顺产。出生后即发现全身散在性含血大疱,继之破溃糜烂。生后7天就诊于皮肤科,因口腔内有类似病掼及乳牙早萌而转入我科。体检:在腕、肘、膝,踝等关节的伸舅有对称性大疱,大部分己破溃,表皮成片剥脱,露 Patients Yu ×, male. The second child, the second production, full-term delivery. After birth that body mass in the bloody bullae, followed by ulcerative erosion. 7 days after birth in dermatology clinic, due to similar diseases in the mouth and early teeth of deciduous teeth into my department. Physical examination: In the wrist, elbow, knee, ankle joints and other uncles have symmetrical bullous, most have ulcerated, the epidermis into pieces of exfoliation, dew