Target sign (tuberculosis)
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At the time the article was created Vincent Tatco had no recorded disclosures.View Vincent Tatco's current disclosures
At the time the article was last revised Daniel J Bell had no recorded disclosures.View Daniel J Bell's current disclosures
The target sign of tuberculosis refers to the bull's eye appearance of some parenchymal tuberculomas involving the brain (see: CNS tuberculosis) and solid abdominal organs (see: hepatic and splenic tuberculosis) on cross-sectional imaging.
- hypoechoic nodules with more echogenic or calcified central areas (hepatic tuberculosis)
- central nidus of calcification surrounded by an area of low attenuation on plain CT
- central enhancement surrounded by an area of low attenuation and/or ring of enhancement on contrast-enhanced CT
- central enhancement accompanied by peripheral rim enhancement on post-contrast MRI
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