A black adrenal adenoma difficult to be differentiated from a malignant adrenal tumor by CT,MRI, scintigraphy and FDG PET/CT examinations |
| |
Authors: | Masatoyo Nakajo Masayuki Nakajo Yoriko Kajiya Atsushi Tani Masashi Tsuruta Satoshi Sugita Shunsaku Fushitani Yoshihisa Umekita |
| |
Institution: | (1) Department of Radiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan;(2) Department of Radiology, Nanpuh Hospital, 14-3 Nagata, Kagoshima 892-8512, Japan;(3) Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan;(4) Department of Tumor Pathology, Field of Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan |
| |
Abstract: | Black adrenal adenoma (BAA) is an adrenal adenoma which contains lipofuscin and has a black or brown appearance. Preoperative
diagnosis of BAA is difficult because it is diagnosed by pathologic findings. We report a case of an incidentally discovered
non-hyperfunctioning BAA in the left adrenal gland of a 58-year-old man. It showed an oval lipid-poor mass, 3 cm × 2 cm in
size on computed tomography (CT) and magnetic resonance imaging (MRI), no avid uptake of 131I-norcholesterol and 123I-meta-iodobenzylguanidine (MIBG) on scintigraphy, and intense avid uptake of 18F-fluorodeoxyglucose (FDG) on positron emission tomography–CT (PET/CT). FDG PET/CT showed that it was a hypermetabolic lesion,
more intense than the activity of the liver, and the maximum standardized uptake value was 5.6 on 1-h early imaging and 8.3
on 2-h delayed imaging, suggesting a malignant tumor. BAA is a clinically rare benign adrenal adenoma, but it should be kept
in mind that BAA may exhibit false-positive results for malignancy or inconclusive results for benignity with modern imaging
modalities including CT, MRI, adrenal scintigraphy with radiolabelled cholesterol and radiolabelled MIBG, and FDG-PET like
this case. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|