Which histologic findings suggest trigger finger (TF)?

Updated: Apr 26, 2021
  • Author: Satishchandra Kale, MD, MBBS, MBA, MCh(Orth), FRCS(Edin), FRCS(Tr&Orth); Chief Editor: Harris Gellman, MD  more...
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Answer

The A1 pulley exhibits a marked degree of hypertrophy, described as a white, cicatricial, collarlike thickening. Microscopy demonstrates degeneration, cyst formation, and plasma-cell infiltration. Microscopic studies have also shown chondrocytic proliferation of type III collagen instead of chondrocyte presence in the normal innermost or friction layer of the A1 pulley. [33] The amount of extracellular matrix is increased significantly when compared with controls.


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