Penis & scrotum


Tancho nodules / paraffinomas / lipogranulomas

Last author update: 1 February 2010
Last staff update: 21 August 2020

Copyright: 2002-2023,, Inc.

PubMed Search: Tancho nodules

Alcides Chaux, M.D.
Antonio L. Cubilla, M.D.
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Cite this page: Chaux A, Cubilla AL. Tancho nodules / paraffinomas / lipogranulomas. website. Accessed September 27th, 2023.
Definition / general
    Tancho nodules:
    • Custom among some Asian populations to implant, inject or insert paraffin or other foreign material (such as glass spheres) under the skin of the penis to improve sexual pleasure
    • Tancho is a brand of hair pomade widely used in the Far East and Southeast Asia

    • Custom among some Asian populations to enlarge penis by injecting mineral oil, paraffin (paraffinoma), silicone or vaseline (Urology 2008;71:1132)
    • Inflammatory / foreign body reaction may occur years after the injection
Clinical features

Tancho nodules:
  • Palpable subcutaneous firm nodules

  • Distortion of organ with evident gross abnormalities
  • May extend to adjacent structures such as scrotum
Case reports
  • May require local surgical resection
Clinical images

Images hosted on other servers:

Intraurethral paraffin

Microscopic (histologic) description
Tancho nodules:
  • Inflammatory foreign body reaction with variable fibrosis surrounding inserted material

  • Numerous vacuoles ranging from tiny to large and cystically dilated (pseudocysts)
  • Stroma may be sclerotic (sclerosing lipogranuloma) and contain inflammatory cells and foreign body giant cells
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