Effects of Tamoxifen on Hepatic Fat Content and the Development of Hepatic Steatosis in Patients with Breast Cancer: High Frequency of Involvement and Rapid Reversal After Completion of Tamoxifen Therapy
Mizuki Nishino1,
Katsumi Hayakawa1,
Yoshiaki Nakamura2,
Taisuke Morimoto2 and
Sumio Mukaihara2
1 Department of Radiology, Kyoto City Hospital, 1-2 Higashi-takada-cho, Mibu,
Nakagyo-ku, Kyoto 604-8845, Japan.
2 Department of Surgery, Kyoto City Hospital, Kyoto 604-8845, Japan.

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Fig. 1. Chart shows mean hepatic CT attenuation values of all
patients throughout study. Among mean CT attenuation values of liver obtained
each year while patients were undergoing tamoxifen therapy, lowest value was
used as "During" (p < 0.0001, paired t test).
Each color represents a different patient.
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Fig. 2A. 55-year-old woman with representative CT findings of
transient hepatic steatosis. Unenhanced abdominal CT image obtained before
tamoxifen therapy shows normal homogeneous CT attenuation of liver, which is
slightly higher than that of spleen. Liverspleen ratio was 1.3.
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Fig. 2B. 55-year-old woman with representative CT findings of
transient hepatic steatosis. Unenhanced abdominal CT image obtained after 1
year of tamoxifen therapy shows decrease in CT attenuation of liver
predominantly in right lobe, with liverspleen ratio of 0.3. Note
development of moderate hepatic steatosis.
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Fig. 2C. 55-year-old woman with representative CT findings of
transient hepatic steatosis. Unenhanced abdominal CT image obtained after 2
years of tamoxifen therapy shows further decrease in CT attenuation of liver
in right lobe, with liverspleen ratio of 0.1. Degree of steatosis is
still moderate.
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Fig. 2D. 55-year-old woman with representative CT findings of
transient hepatic steatosis. Unenhanced abdominal CT image obtained 1 year
after completion of tamoxifen therapy shows that CT attenuation of liver has
returned to normal, with liverspleen ratio of 1.1. Steatosis is not
present.
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Fig. 3. Chart shows liverspleen ratio in 29 patients with
hepatic steatosis before, during, and after tamoxifen therapy.
Liverspleen ratio was calculated using lowest CT attenuation value of
liver among values in the eight Couinaud segments. Each color represents a
different patient.
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Copyright © 2003 by the American Roentgen Ray Society.