Skip to main content
Insights into Imaging
Fig. 2 | Insights into Imaging

Fig. 2

From: Small (<1 cm) incidental echogenic renal cortical nodules: chemical shift MRI outperforms CT for confirmatory diagnosis of angiomyolipoma (AML)

Fig. 2

A 45-year-old woman with incidental echogenic renal cortical nodule. Sagittal and transverse grey scale (a) and colour (b) images of the left kidney depict a homogeneously hyperechoic nodule in the lower pole (white arrows), which measures 10 × 12 × 14 mm in size. Axial contrast-enhanced CT image (b) confirms the presence of a low-density nodule in the lower pole of the left kidney that measures −42 HU, diagnostic of gross fat and AML. Axial T1-weighted in-phase (IP) (c), opposed-phase (OP) (d) and spectral fat suppressed (FS) (e) gradient recalled echo (GRE) images demonstrate that the AML is isointense to retroperitoneal fat on IP (solid black arrow in c) and demonstrates loss of with FS (open black arrow in e) also diagnostic of gross or mature fat. Similarly, gross fat is diagnosed on the OP (d) by noting “india ink” or “etching” artefact at the margin of the nodule and the adjacent kidney (black arrow) and the absence of etching artefact at the interface of the nodule with retroperitoneal fat (dotted arrow)

Back to article page