The bright dot sign refers to presence of a bright dot within a lesion which remains hyper-attenuating on arterial and portal venous phase CT, corresponding to early nodular enhancement seen on dynamic MRI of liver haemangioma.
This can be used as an indicator that the lesion in question is a haemangioma (and not a metastasis). Dynamic MRI should be confirmatory.
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- 1. Jang HJ, Choi BI, Kim TK et-al. Atypical small hemangiomas of the liver: "bright dot" sign at two-phase spiral CT. Radiology. 1998;208 (2): 543-8. Radiology (citation) - Pubmed citation
- 2. Jang HJ, Kim TK, Lim HK et-al. Hepatic hemangioma: atypical appearances on CT, MR imaging, and sonography. AJR Am J Roentgenol. 2003;180 (1): 135-41. AJR Am J Roentgenol (citation) - Pubmed citation
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