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| The role of multi-slice spiral CT and ultrasonography in the diagnosis of nutcracker phenomenon |
| JIAO Jian, DU Jiquan, MENG Mei, ZHANG Peng |
| Medical Imaging Department, Shandong Provincial Crops Hospital, Chinese People's Armed Police Force, Jinan 250014,China |
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Abstract Objective To explore the value of multi-slice spiral CT(MSCT) and ultrasonography (US) in diagnosing nutcracker phenomenon (NCP). Methods The imaging data on 60 patients with abdominal MSCT and US was retrospectively analyzed. The 30 patients in the observation group were confirmed as cases of NCP.In the control group, 30 patients without NCP who underwent abdominal MSCT and US examination for other reasons were randomly selected.The aortomesenteric angle (AMA), the inner diameter (DD) and peak velocity (PVd) of the left renal vein near hilar dilatation, the inner diameter (DN) and peak velocity (PVn)of the narrowest part of the LRV in the AMA were obtained and analyzed statistically. Results Both MSCT and US could accurately measure AMA,DD and DN. An independent examination showed statistically significant difference in the data on the two groups(P<0.05), while the single-factor comparison between the two examination methods showed no significant difference (P>0.05). PVd and PVn could be measured in US, and there was significant difference between the two groups (P<0.05).However, MSCT had obvious advantages in the diagnosis of concomitant symptoms in patients with NCP.In the observation group using MSCT examination, there were 12 cases of dilatation and thickening of the left lumbar vein and reproductive vein, 7 cases of narrowing of horizontal parts of duodenum, 5 cases of enlargement of the left kidney volume compared to the right kidney, and 3 cases of decrease in CT enhancement density of the left renal cortex compared with the contralateral renal cortex. Conclusions MSCT and US are the main means of diagnosis of NCP, but MSCT is superior.
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Received: 11 February 2021
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2021, Vol. 32 
