Badiola Díez J J, Camón Urgel J, Hidalgo Chapado J M
Arch Esp Urol. 1980 Jan-Feb;33(1):77-104.
Four types of abnormalities has been recorded on a study about cystic diseases of donkey's kidneys, collected at the Madrid Slaughter-house. These four categories are as follows: a) simple isolated renal cysts; b) multiple renal cysts; c) adult polycystic kidneys; and d) focal renal cystic dysplasia and hypoplasia. From a total of 26 cases macroscopically and histopathologically studied, 7 exhibed unilateral and 19 bilateral lesions. Different combinations of the four types above mentioned were found when both kidneys were affected. The evidence of some of the cysts being communicated with normal tubulus or with other cysts, suggests that some of them could represent simple dilatations involving segments of nephrone or collecting system. These findings do not fit with the previous explanation of the no occurrence of communication between the metanephric blastema and the ureteral bud or with the obstructive theory, and suggest the occurrence of various etiopathologic factors as responsible for the three first types of cystic abnormalities above mentioned.
在一项对马德里屠宰场收集的驴肾囊性疾病的研究中，记录了四种异常情况。这四类情况如下：a）单纯孤立性肾囊肿；b）多发性肾囊肿；c）成人多囊肾；d）局灶性肾囊性发育不良和发育不全。在总共26例经宏观和组织病理学研究的病例中，7例表现为单侧病变，19例为双侧病变。当双侧肾脏均受累时，发现了上述四种类型的不同组合。一些囊肿与正常肾小管或其他囊肿相通的证据表明，其中一些可能代表涉及肾单位或集合系统节段的单纯扩张。这些发现与之前关于后肾胚基与输尿管芽之间不发生连通的解释或梗阻理论不符，并提示多种病因学因素是上述前三种类型囊性异常的原因。
