Ghon lesion

A Ghon lesion, sometimes called a Ghon focus, represents a tuberculous caseating granuloma (tuberculoma) and represents a sequela of primary pulmonary tuberculosis infection.


Radiologically, this term is used quite loosely to refer to a calcified granuloma; technically, the Ghon lesion is the initial tuberculous granuloma formed during primary infection and is not radiologically visible unless it calcifies - this occurs in up to 15% of cases 4.

A Ghon focus alongside ipsilateral mediastinal lymphadenopathy is known as a Ghon complex. A calcified Ghon complex (Ghon lesion and ipsilateral mediastinal lymph node) is called a Ranke complex, which is radiologically detectable. Thus the Ranke complex represents a progression of the Ghon complex, rather than being a separate entity in itself 4.

History and etymology

Anton Ghon (1866-1936) was an Austrian pathologist who spent his life researching tuberculosis and meningitis 3.


Article information

rID: 8644
System: Chest
Section: Signs
Tag: tb, lungs
Synonyms or Alternate Spellings:
  • Ghon's focus
  • Ghon's complex
  • Ghon's lesion
  • Ghon complexes
  • Ghon lesions
  • Ghon foci
  • Ghon complex
  • Ghon focus

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Cases and figures

  • Figure 1: gross pathology - Ghon lesion
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