- “The CT features are characteristic. Lesions usually have a negative Hounsfield unit value owing to macroscopic fat. Because of intermixed hematopoietic tissue, the attenuation is usually higher than that of retroperitoneal fat. High-attenuation regions may be seen due to hemorrhage or calcifications.”
CT and MR Imaging of Extrahepatic Fatty Masses of the Abdomen and Pelvis: Techniques, Diagnosis, Differential Diagnosis, and Pitfalls
Pereira JM et al.
RadioGraphics January 2005 vol. 25 no. 1 69-85 - “Myelolipoma is an uncommon benign tumor composed of mature adipose cells and hematopoietic tissue. The prevalence in autopsy series is between 0.08% and 0.2% . Typically, myelolipoma arises in the adrenal gland. Extra-adrenal myelolipoma is rare and is found most commonly in the presacral and other retroperitoneal areas . Usually asymptomatic and discovered incidentally at cross-sectional imaging, myelolipoma occasionally causes discomfort due to compression or hemorrhage.”
CT and MR Imaging of Extrahepatic Fatty Masses of the Abdomen and Pelvis: Techniques, Diagnosis, Differential Diagnosis, and Pitfalls
Pereira JM et al.
RadioGraphics January 2005 vol. 25 no. 1 69-85 - Myelolipoma
Change over time
-remain stable
-enlarge
-get smaller
Complications
-mass effect
-hemorrhage - Myelolipoma
-Benign
-Nonfunctioning
-Hematopoeitic tissue & mature adipose
-2-17 cm - Adrenal Lesions that Contain Fat: Differential Diagnosis
- Adrenal Myelolipoma
- Adrenal Adenoma
- Adrenal Pheochromocytoma
- Adrenal Carcinoma
|
