MRI Diagnosis of Adrenal Myelolipoma(A Report of 13 Cases and Correlated with Pathology) / 实用放射学杂志

ABSTRACT

Objective To investigate the MRI manifestations and its pathologic foundation of adrenal myelolipoma.Methods MRI images of 13 patinets with adrenal myelolipoma confirmed by pathological assessment were analyzed retrospectively.MRI fingings were also studied in correlation with surgical pathology.Results The MRI diagnosis of adrenal myelolipoma in 13 patients were correct preoperative.Huge mass in the adrenal were found in 11 patients with T 1WI high signal intensity and mixed with conclamata and stripe low signal intensity.The high signal intensity was mature fatty tissue and the low signal intensity was myeloid tissue on pathologic examination.2 patients appeared as mixed signal intensity principle isointensity on T 1WI images,and the pathological findings was tumor hemorrhage.The high signal intensity changes to low signal intensity and slight higher than the signal of subcutaneous fatty tissue on T 1WI or T 1WI with fatty suppression.The low signal intensity of the myeloid tissue and the hemorrhage were high sinal intensity.No enhancement were found in all patients.Partly capsule enhancement were found in 2 patients with tumor hemorrhage and infection.The inferior cava vena was displaced to the anterior and internal side in all patients.Conclusion The characteristic manifestation of adrenal myelolipoma is high signal intensity change of the fatty tissue and no enhancement on contrast-enhanced MRI image.MRI could give correct diagnosis of the adrenal myelolipoma preoperative.