A rare congenital disorder of childhood that is characterized by rapid onset of the physical changes typical of old age, usually resulting in death before the age of 20. (儿童的)早衰症一种少见的少年身体机能失调，以类似年老的身体快速变化为特征，其结果通常导致二十岁之前死亡。
An abnormal duct or passage resulting from injury, disease, or a congenital disorder that connects an abscess, a cavity, or a hollow organ to the body surface or to another hollow organ. 瘘，瘘管由于受伤、疾病或先天性变形引起的把脓肿、腔洞或空器官同身体或其它空器官连结起来的病变的通道
