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Vesiculobullous and Desquamtive Lesions- II. Course 341 MDSDr Asma'a Fadenhttp://faculty.ksu.edu.sa/Asmaa Faden/default.aspx. Definitions: Normal mucosa. Vesicle. Bullae. Desquamative.. Bullae: . A bulla is a blister more than 5 mm in diameter with thin walls that is full of fluid. In Latin a bulla was a "bubble, stud or knob." It referred to any rounded protrusion, particularly one that was hollow or cystic..
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