Angiomyolipoma with minimal fat: differentiation of morphological and enhancement features from renal cell carcinoma at CT imaging

Abstract

CT images with non-round shape without capsule and prolonged enhancements may be used to differentiate AML with minimal fat from RCC.

Nephrectomy Avoided in a Patient with Lipid Poor Angiomylipoma with Radiological Features Suspicious for Renal Cell Carcinoma: A Case Report

“…It was concluded that, in CT imaging, "non-round shape" in the absence of capsule and prolonged enhancement were factors that could distinguish minimal-fat AML from RCC [8]. Prolonged enhancement was also found to be an important radiological feature in distinguishing the two pathologies by Kim et al [9].…”

A case of renal cell carcinoma and angiomyolipoma in an adolescent girl

“…[2][3][4] Could this patient have TSC, or could the angiomyolipoma be unusual renal metastases presenting radiologically as angiomyolipoma? [5] Could her freckles be mistaken for angiofibromas, which would support the diagnosis of tuberous sclerosis? These are important considerations in this case that may offer some treatment options.…”

Differentiation of fat-poor angiomyolipoma from clear cell renal cell carcinoma in contrast-enhanced MDCT images using quantitative feature classification

“…While it is known that unenhanced CT images have an advantage when used to differentiate between two types of masses compared to phase CT images, most approaches incorporate both unenhanced and contrast‐enhanced (CE) CT images to classify renal masses . Lee‐Felker et al.…”

“…Sung et al. evaluated several morphological features, including the degree of roundness and the presence of capsules, and enhancement patterns to differentiate between fp‐AML and RCC via chi‐square tests of unenhanced and early excretory phase CT . Ishigami et al.…”