Simon focus

A Simon focus is a tuberculosis (TB) nodule that can form in the apex of the lung when a primary TB infection elsewhere in the body spreads to the lung apex via the bloodstream.[1] Simon focus nodules are often calcified.[1]

References

  1. ^ a b Leung, AN (1999 Feb). "Pulmonary tuberculosis: the essentials.". Radiology 210 (2): 307–22. PMID 10207408.