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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Angiomyolipoma classification

Introduction

Overview

Overview

Angiomyolipoma may be classified according to radiologic appearance into 7 subtypes: classic angiomyolipoma, triphasic angiomyolipoma, fat poor angiomyolipoma, hyperattenuating angiomyolipoma, isoattenuating angiomyolipoma, angiomyolipoma with epithelial cysts, and angiomyolipoma in lymphangioleiomyomatosis.[1]

Classification

Classification

Angiomyolipoma may be classified according to World Health Organization (WHO) into as follows:[1][2][3][4]

Radiologic Classification Features

Classic angiomyolipoma

Triphasic angiomyolipoma

Fat poor angiomyolipoma

Hyperattenuating angiomyolipoma

  • Abundant smooth muscle component
  • Hyperattenuating tissue

Isoattenuating angiomyolipoma

  • Scattered fat tissue
  • Smooth muscle component

Angiomyolipoma with epithelial cysts

Angiomyolipoma in lymphangioleiomyomatosis

  • Atypical smooth muscle component
  • Cystic changes
References

References

  1. ↑ 1.0 1.1 Jinzaki M, Silverman SG, Akita H, Nagashima Y, Mikami S, Oya M (2014). “Renal angiomyolipoma: a radiological classification and update on recent developments in diagnosis and management”. Abdom Imaging. 39 (3): 588–604. doi:10.1007/s00261-014-0083-3. PMC 4040184. PMID 24504542.
  2. ↑ Lane BR, Aydin H, Danforth TL, Zhou M, Remer EM, Novick AC; et al. (2008). “Clinical correlates of renal angiomyolipoma subtypes in 209 patients: classic, fat poor, tuberous sclerosis associated and epithelioid”. J Urol. 180 (3): 836–43. doi:10.1016/j.juro.2008.05.041. PMID 18635231.
  3. ↑ Park, Byung Kwan (2017). “Renal Angiomyolipoma: Radiologic Classification and Imaging Features According to the Amount of Fat”. American Journal of Roentgenology. 209 (4): 826–835. doi:10.2214/AJR.17.17973. ISSN 0361-803X.
  4. ↑ Silverman, Stuart G.; Mortele, Koenraad J.; Tuncali, Kemal; Jinzaki, Masahiro; Cibas, Edmund S. (2007). “Hyperattenuating Renal Masses: Etiologies, Pathogenesis, and Imaging Evaluation”. RadioGraphics. 27 (4): 1131–1143. doi:10.1148/rg.274065147. ISSN 0271-5333.


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Cafer Zorkun, M.D., Ph.D. [2], Faizan Sheraz, M.D. [3],Rekha, M.D.