Abstract:

Objective To investigate the imaging features and postoperative follow-up of adrenocortical oncocytic adenocarcinoma. Methods The imaging features of 10 cases with adrenocortical oncocytic adenocarcinoma confirmed by pathological analysis were retrospectively analyzed with postoperative follow-up. Results CT scan in 10 patients: CT displayed isointense or slightly hypodense mass. The signals were slight hyperintensity on both T1-and T2-weighted images, and in the arterial phase, the images of enhanced CT and enhanced MRI showed mild heterogeneous enhancement, and continuously enhanced in venous and delay phase. In the postoperative follow-up of 10 patients after CT contrast enhanced scan, relapse and metastasis weren't seen in 9 cases, 1 case was found relapse a half year after operation and metastasis followed. Conclusion The adrenocortical oncocytic adenocarcinoma has little clinical or imaging characteristics. It is difficult to make a differential diagnosis by imaging before operation, and may be misdiagnosed as pheochromocytoma or other tumours. To large nonfunctioning adrenal tumor, the possibility of oncocytic adenocarcinoma should be considered. As the adrenocortical oncocytic adenocarcinoma has its borderline and malignant, the postoperative follow-up is significant.

Key words: adrenocortical oncocytic neoplasm, adrenal tumor, follow-up