Achilles tendon xanthomas are painless soft tissue masses occurring most commonly at the distal one-third of the tendon and are usually bilateral and symmetrical.
It is characterized by localised accumulation of lipid-laden macrophages, inflammatory cells and giant cells secondary to cholesterol deposition in tissue.
- soft tissue densities in the Achilles tendon
- an AP thickness of the tendon >7 mm in males and >6 mm in females
- loss of normal tendon appearance with multiple hypoechoic foci within the tendon
- increased AP diameter
- hyperintense on T1- and T2-weighted images
- loss of the normal anterior concavity of the tendon
- convexity of the anterior aspect of the tendon
- speckled appearance of the tendon
- focal thickening of the tendon
- 1. Rodriguez CP, Goyal M, Wasdahl DA. Best cases from the AFIP: atypical imaging features of bilateral Achilles tendon xanthomatosis. Radiographics. 2008;28 (7): 2064-8. doi:10.1148/rg.287085001 - Pubmed citation
- 2. Schweitzer ME, Karasick D. MR imaging of disorders of the Achilles tendon. AJR Am J Roentgenol. 2000;175 (3): 613-25. doi:10.2214/ajr.175.3.1750613 - Pubmed citation
- 3. May DA et-al. Musculoskeletal imaging. Mosby. ISBN:0323011896. Read it at Google Books - Find it at Amazon