Presentation
Ultrasound performed for right upper quadrant pain regarding clinical presentation with presumed cholecystitis. Incidental renal abnormality identified.
Patient Data
Large hyperechoeic mass in the right kidney, in keeping with a AML.
The mass is well circumscribed, without any significant Doppler activity within.
Large mass in the upper and mid-pole of the right kidney insinuating into the renal sinus fat.
The mass is well circumscribed and follows fat across all sequences.
Findings in keeping with a angiomyolipoma (AML).
Static image from coil-embolization procedure.
Follow-up imaging post procedure is scheduled.
Case Discussion
The kidneys are a common site for angiomyolipomas, and are often incidental findings.
This case beautifully demonstrates fat suppression on MRI - the lesion is almost entirely fat, although content can be variable.
Larger lesions may hemorrhage and hence require treatment if larger than 4cm, typically with embolization.