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Soft Tissue Tumors

Adipose tissue

Lipoma of tendon sheath


Reviewer: Charanjeet Singh, M.D. (see Reviewerspage)
Revised: 11 November 2012, last major update June 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Lipoma attached to tendon

Terminology
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● Not a WHO diagnosis
● May be a variant of lipoma arborescens

Epidemiology
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● Very rare
● Adults age 40 years or less (Radiographics 2004;24:1433)

Sites
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● Tendons of hands and wrist
● Less often ankle and foot

Case reports
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● Causing carpal tunnel syndrome (Orthop Rev 1988;17:1083)
● Causing quadriceps tendon rupture (Cir Cir 2008;76:259)

Gross description
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● Focal lipomatous mass resembling lipoma

Micro description
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● Resembles lipoma, but adherent to tendon or intersecting its fibers

Micro images
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Tendon lipoma

Differential diagnosis
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Lipoma arborescens: usually not a discrete mass, affects knee, not hands/wrist

End of Soft Tissue Tumors > Adipose tissue > Lipoma of tendon sheath


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