:5~10cm,,,adhesions,orlymphoidhyperplasiaAppendixistwisted,andLumenofappendixisnarrow,,,pressurecauseappendixdistortedObstruction→highpressure→limphobstructed,ischemia→mucosadamage→bacteriainvade(70%~80%),,:Ecoli,us,Pseudomonas,anaerobe10.
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