McDermott V G, Meakem T J, Stolpen A H, Schnall M D
Department of Diagnostic Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104.
AJR Am J Roentgenol. 1995 Jan;164(1):123-7. doi: 10.2214/ajr.164.1.7998524.
Cysts of the prostate or perioprostatic tissues are uncommon and include congenital müllerian or utricular cysts, prostatic retention cysts, cysts of benign prostatic hyperplasia, cystic carcinoma, parasitic and infectious cysts, as well as cysts of the ejaculatory apparatus or seminal vesicles. The radiological diagnosis of prostatic or periprostatic cysts can be difficult because of the resolution needed to define the relationship of a cyst to surrounding structures, such as the vas deferens, seminal vesicles, and ejaculatory ducts [1]. Prostatic cysts are easily identified on MR images by virtue of their high signal on T2-weighted images and can be characterized because of their typical locations and the high resolution and multiple imaging planes provided by MR [2]. Because these conditions are usually managed conservatively, pathologic proof is not possible in all cases, and the diagnosis is often made on the basis of clinical features and imaging appearance. The purpose of this essay is to illustrate the findings on MR imaging.
前列腺或前列腺周围组织的囊肿并不常见，包括先天性苗勒管或尿道囊肿、前列腺潴留囊肿、良性前列腺增生囊肿、囊性癌、寄生虫性和感染性囊肿，以及射精装置或精囊囊肿。由于需要分辨囊肿与周围结构（如输精管、精囊和射精管）的关系，前列腺或前列腺周围囊肿的影像学诊断可能具有挑战性[1]。前列腺囊肿在磁共振成像（MR）图像上很容易识别，因为它们在T2加权图像上呈高信号，并且由于其典型位置以及MR提供的高分辨率和多成像平面而能够得以特征化[2]。由于这些情况通常采用保守治疗，并非所有病例都能获得病理证据，诊断往往基于临床特征和影像学表现。本文旨在阐述MR成像的表现。
