Tunica albuginea cyst

Tunica albuginea (TA) cysts are the most common extratesticular benign scrotal mass lesion. They are a type of scrotal tunica cyst.

Their mean age at presentation is 40 years (although may be seen in the 5th and 6th decades).

They are usually palpable.

They arise from the tunica albuginea, a fibrous layer below the tunica vaginalis which closely covers the testicle. The exact pathogenesis of tunica albuginea cysts is not known but it is believed to arise from the mesothelia.

They are characteristically located at the upper anterior or lateral aspect of the testicle. 

Ultrasound is the first line modality for imaging.

  • typically seen as an anechoic paratesticular cyst
  • usually ~2-5 mm in diameter
  • sharply demarcated
  • unilocular or multilocular
  • no solid components
  • no disturbance of the adjacent testicular tissue
  • rarely calcify
  • occasional milk of calcium or even a complex appearance

On ultrasound consider:

Ultrasound - testicular and scrotal

Article information

rID: 27914
System: Urogenital
Synonyms or Alternate Spellings:
  • Tunica albuginea cysts
  • Tunica albuginea (TA) cyst
  • Tunica albuginea (TA) cysts

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