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British Journal of Radiology (2003) 76, 866-874
© 2003 British Institute of Radiology
doi: 10.1259/bjr/99569888
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Small "indeterminate" lesions on CT of the liver: a follow-up study of stability

P J Robinson, MB, FRCP, FRCR1, P Arnold, BSc1 and D Wilson, MSc2

1 Clinical Radiology Research Unit and 2 Medical Physics Department, St James's University Hospital, Beckett Street, Leeds LS9 7TF, UK



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  		Figure 1. Mixed stable and unstable lesions in a patient with oesophageal carcinoma. The small lesion seen on the initial CT (a) remained unchanged throughout follow up, but the final CT study (c) also showed several liver metastases with similar appearances to those of the stable lesion.

 


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  		Figure 2. Typical appearance of a stable lesion with a well-defined edge and homogeneous low attenuation in a patient with colonic cancer.

 


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  		Figure 3. A small but sharply defined lesion (arrow) which remained stable over 9 months in a patient with ovarian carcinoma—note ascites on the initial CT.

 



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  		Figure 4. Typical unstable small lesion in a patient with ovarian cancer. At staging (a), the subcentimetre low attenuation lesion (arrow) was regarded as indeterminate. Interval studies over the next 4 years showed gradual progression of disease with the development of surface lesions (b–f).

 


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  		Figure 5. "Disappearing" lesion in a patient with colon cancer. CT at staging showed an indeterminate small lesion (a) which remained visible on follow up CT up to 17 months (b, c) but on later follow up at 20, 25, 27 and 33 months, the lesion was undetectable (d–h). Note g and h are contiguous slices from the final examination.

 




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