Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
Jpn J Radiol. 2012 Aug;30(7):594-7. doi: 10.1007/s11604-012-0083-6. Epub 2012 Apr 24.
We report a male case of primary retroperitoneal mucinous cystadenoma (PRMC) that was at initially misdiagnosed as a complicated renal cyst. On ultrasonography, a 71-year-old man was found to have an abdominal mass suspicious for right renal cyst. The initial computed tomography scan showed an unenhanced, low-density mass that deformed the edge of the right kidney into a beak shape. Four years later, the mass had increased in size. Magnetic resonance imaging revealed a cystic lesion. Its intracystic content showed relatively high intensity on a T1-weighted image, and the coronal gadolinium-enhanced T1-weighted image with fat suppression clearly showed a multilocular cystic mass without enhancing mural nodules. The final diagnosis of PRMC was obtained pathologically after surgery. Because PRMC has malignant potential, this rare entity should be considered when a retroperitoneal cystic tumor is evaluated, even in a male patient.
我们报告了 1 例原发性腹膜后黏液囊腺瘤（PRMC）男性病例，该病例最初被误诊为复杂肾囊肿。超声检查发现 1 名 71 岁男性有腹部肿块，疑似右肾囊肿。初始 CT 扫描显示未增强的低密度肿块，使右肾边缘呈喙状变形。4 年后，肿块增大。磁共振成像显示囊性病变。其囊内成分在 T1 加权图像上显示相对高信号，冠状位钆增强 T1 加权图像脂肪抑制清晰显示多房囊性肿块，无增强壁结节。术后病理诊断为 PRMC。由于 PRMC 具有恶性潜能，因此在评估腹膜后囊性肿瘤时，即使是男性患者，也应考虑这种罕见实体。
