Tsushima Y, Sato N, Ishizaka H, Matsumoto M
Department of Diagnostic Radiology, Gunma University Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. 1992 Apr 25;52(4):436-42.
Junctional parenchymal defect (JPD) is a triangular or linear hyperechoic structure in the anterosuperior or posteroinferior surface of the kidney. The intermediate septum is a band-like cortex, running obliquely in the central echo complex. Some authors have suggested that these structures result from partial fusion of the embryonic parenchymatous masses called renunculi (renunculi theory). In a prospective study of 600 adult patients, the anterosuperior JPD of the right kidney was most frequently identified on ultrasonography (33.5%). The incidence of JPD did not depend on sex or age, and intermediate septum was frequently associated with JPD (71.4%). These data are compatible with the renunculi theory. The prominent septum of Bertin was located in the same position on the intermediate septum in the majority of cases (96.7%). Therefore, we suggest that the typical prominent septum of Bertin may be an incomplete intermediate septum. In order to differentiate JPD from pathologic conditions such as cortical scar or hyperechoic tumor, it is necessary to identify its characteristic location and shape.
肾窦旁实质缺损（JPD）是肾脏前上表面或后下表面的三角形或线性高回声结构。中间隔是一条带状皮质，在中央回声复合体中呈斜行。一些作者认为，这些结构是由称为肾小叶的胚胎实质团块部分融合所致（肾小叶理论）。在一项对600例成年患者的前瞻性研究中，超声检查最常发现右肾前上JPD（33.5%）。JPD的发生率与性别或年龄无关，中间隔常与JPD相关（71.4%）。这些数据与肾小叶理论相符。在大多数病例（96.7%）中，贝尔廷突出隔位于中间隔的相同位置。因此，我们认为典型的贝尔廷突出隔可能是不完全的中间隔。为了将JPD与皮质瘢痕或高回声肿瘤等病理状况区分开来，有必要确定其特征性位置和形态。
