53 Renal Angiomyolipoma

Clinical Presentation

Patient underwent ultrasound exam for nonspecific abdominal pain; incidental finding.

Fig. 53.1 (A,B) Ultrasound images show a single large echogenic lesion (arrow) arising from the lower pole of the right kidney with internal color Doppler flow. (C) Contrast-enhanced coronal CT image from the same patient demonstrates a predominantly fat-containing vascular mass in the lower pole of the right kidney (arrow).

Radiologic Findings

A sagittal ultrasound image demonstrates a large echogenic lesion in the lower pole of the right kidney (Fig. 53.1A) with internal color Doppler flow (Fig. 53.1B). Contrast-enhanced coronal computed tomography (CT) images from the same patient demonstrate a predominantly fat-containing vascular mass in the lower pole of the right kidney corresponding to the lesion seen on ultrasound (Fig. 53.1C).