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Chinese Journal of Endourology(Electronic Edition) ›› 2021, Vol. 15 ›› Issue (01): 12-16. doi: 10.3877/cma.j.issn.1674-3253.2021.01.004

Special Issue:

• Clinical Research • Previous Articles     Next Articles

CT features for the differential diagnosis of the hidden pheochromocytoma and cortical adenoma

Rui Zhong1, Qiguang Chen1, Dan Sun1, Cuize Kong1, Zeliang Li1,()   

  1. 1. Department of Urology, the First Affiliated Hospital of China Medical University, Shenyang 110000, China
  • Received:2020-10-16 Online:2021-02-01 Published:2021-02-01
  • Contact: Zeliang Li

Abstract:

Objective

To investigate the differential diagnosis of hidden pheochromocytoma and adrenal cortical adenoma according to their CT features.

Methods

A total of 177 patients with adrenal tumors admitted to the First Affiliated Hospital of China Medical University from January 2010 to January 2020 were collected for retrospective analysis, and the general clinical data and CT features of patients in each group were compared.

Results

There were 56 cases of hidden pheochromocytoma, 32 cases of cortisol adenoma, 44 cases of aldosterone adenoma, 45 cases of non-functional adenoma. There were statistically significant differences between the group of hidden pheochromocytoma and the group of non-functional adenoma. The tumor diameter, scan CT value, and delay arterial enhancement CT value on hidden pheochromocytoma group were significantly greater than three adrenal adenoma groups. When the tumor diameter ≥2.95 cm was used to diagnose the hidden pheochromocytoma, AUC was 0.872, sensitivity was 87.5%, specificity was 76.0%. When the CT value of plain scan was ≥24.5 Hu, the AUC, sensitivity and specificity were 0.929, 94.0% and 82.5% respectively. When the arterial enhanced CT value ≥89.5 Hu, AUC was 0.886, sensitivity was 72.7%, and specificity was 90.6%. When the enhanced CT value in the delay period was ≥82.5 Hu, the AUC, sensitivity and specificity were 0.937, 84.6% and 95.3% respectively. When combined with the above four indicators, the AUC was 0.981, the threshold was ≥0.118, the sensitivity was 100%, and the specificity was 90.6%.

Conclusion

The value of 24.5 Hu in plain scan, 89.5 Hu in arterial enhanced CT and 82.5 Hu in delayed enhanced CT with tumor diameter of 2.95 cm is useful for the differential diagnosis of adrenal hidden pheochromocytoma.

Key words: Adrenal pheochromocytoma, Adrenocortical adenoma, CT texture, I-MIBG, Differential diagnosis, AUC, ROC

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