Cho Hee Woo, Lee Young Han, Chung Soo Yoon, Park Jin-Oh, Suh Jin-Suck
Department of Radiology, Research Institute of Radiological Science, Medical Convergence Research Institute, Seoul, Republic of Korea Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea.
Acta Radiol. 2016 Apr;57(4):494-9. doi: 10.1177/0284185115578889. Epub 2015 Mar 30.
Incidental renal cysts are a very common finding in routine lumbar spine magnetic resonance imaging (MRI). However, there is no report of the renal cyst detection rate on routine lumbar spine MRI.
To determine the renal cyst detection rate in routine lumbar spine MRI based on findings of abdominal computed tomography (CT), and to investigate if the largest renal cyst seen by abdominal CT could be also detected by routine lumbar spine MRI.
A retrospective study was conducted of 70 patients who underwent both routine lumbar spine MRI and abdominal CT between December 2011 and January 2014. The detection rate of all renal cysts>5 mm as well as the largest renal cyst seen by abdominal CT were assessed in routine lumbar spine MRI.
On routine lumbar spine MRI, the detection rate of renal cysts was 46.5% (73/157) for>5-mm renal cysts and 68.0% (34/50) for>10-mm renal cysts, correlating with abdominal CT. The detection rate of the largest renal cyst seen by abdominal CT was 60.0% (27/45). Non-detection of the largest renal cyst could be caused by upper positioning (n = 7), lateral positioning (n = 6), or relatively small cyst size (n = 5).
Approximately half of renal cysts>5 mm and two-thirds of renal cysts>10 mm were detected on routine lumbar spine MRI. However, radiologists should be aware that kidney lesions may not be included in the scan coverage of routine lumbar spine MRI.
偶然发现的肾囊肿在常规腰椎磁共振成像（MRI）中是非常常见的表现。然而，尚无关于常规腰椎MRI检查中肾囊肿检出率的报道。
根据腹部计算机断层扫描（CT）结果确定常规腰椎MRI检查中肾囊肿的检出率，并探讨腹部CT所见最大肾囊肿是否也能在常规腰椎MRI检查中被发现。
对2011年12月至2014年1月期间接受常规腰椎MRI和腹部CT检查的70例患者进行回顾性研究。在常规腰椎MRI检查中评估所有直径>5 mm肾囊肿的检出率以及腹部CT所见最大肾囊肿的情况。
在常规腰椎MRI检查中，直径>5 mm肾囊肿的检出率为46.5%（73/157），直径>10 mm肾囊肿的检出率为68.0%（34/50），与腹部CT结果相关。腹部CT所见最大肾囊肿的检出率为60.0%（27/45）。最大肾囊肿未被发现可能是由于上定位（n = 7）、侧定位（n = 6）或囊肿相对较小（n = 5）。
在常规腰椎MRI检查中，约一半直径>5 mm的肾囊肿和三分之二直径>10 mm的肾囊肿能够被发现。然而，放射科医生应意识到肾脏病变可能未被纳入常规腰椎MRI检查的扫描范围。
