本研究中21位病人在腎臟切除手術之前及之後分別接受核子醫學腎臟掃瞄檢查，結果發現共有6例病例(29%)在原腎臟切除之部位發生假腎之影像。一例所產生之影像強度與正常側相當，其餘5例影像強度則較低。五例假腎發生於左側佔83%，僅一例發生於右側。其中二位病例為接受單純性腎臟切除，二例接受根除性腎臟切除，另二例則接受腎臟輸尿管切除術。六例中共有四其假腎臟影像之出現由掃瞄早期持續至晚期，二例則僅在晚期時才出現假腎之影像。假腎之出現與否似乎與所切除腎臟之原來功能高低有所關連。此種假腎可能出現之情形容易導致臨床病人腎臟核子醫學掃瞄判讀上之錯誤，不可不慎。

A survey was conducted on 21 nephrectomized patients (M:F=13:8) who underwent the routine 99m Tc-DTPA radionuclide kidney scan, including blood flow imaging at various periods pre- and postoperatively. Perfusion of tracer in the area of the nephrectomized kidney (phantom kidney) was demonstrated in 6 patients (29%) with equal (1 case) or less (5 cases) activity than the actual kidney. Five phantom kidneys (83%) were found on the left and one on the right. Two patients were psot simple nephrectomy, 2 post radical nephrectomy, and 2 post nephroureterectomy with removal of bladder cuff. Four patients had persistent radioactivity throughout the whole course of imaging, two patients had phantom kidney appearing in the late phase of imaging. The appearance of phantom kidney had a correlation with the patient’s preoperative renal plasma flow. This phenomenon could be a source of error in the interpretation of kidney imaging. (J Urol R.O.C., 1: 128-133, 1990)