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Related Experiment Videos

Nontumorous decrease in Tc-99m GSA accumulation.

S Akaki1, S Kanazawa, M Tsunoda

  • 1Department of Radiology, Okayama University Medical School, Japan. akaki@cc.okayama-u.ac.jp

Annals of Nuclear Medicine
|February 24, 2001
PubMed
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Nontumorous decreases in technetium-99m-labeled galactosyl-human serum albumin (99mTc-GSA) liver uptake occur in 12% of patients. These findings often relate to reduced portal venous flow or hepatic necrosis, impacting liver function assessment.

Area of Science:

  • Nuclear Medicine
  • Hepatology
  • Radiology

Background:

  • Understanding nontumorous decreases in 99mTc-GSA accumulation is crucial for accurate hepatic function evaluation.
  • This phenomenon is not extensively documented in existing literature.

Purpose of the Study:

  • To investigate the incidence and potential causes of nontumorous decreases in 99mTc-GSA accumulation in liver scintigraphy.

Main Methods:

  • Retrospective review of transaxial SPECT scintigrams from 269 patients who underwent 99mTc-GSA liver scintigraphy.
  • Analysis of regions with decreased 99mTc-GSA accumulation to identify correlations with portal venous flow and liver pathology.

Main Results:

  • Nontumorous decreases in 99mTc-GSA accumulation were observed in 32 of 269 patients (12%).

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  • In 16 patients (6%), these decreases correlated with reduced regional portal venous flow, often due to hepatocellular carcinoma or cholangiocarcinoma.
  • In 8 patients (3%), decreased accumulation was linked to hepatic necrosis, scarring, or biliary stasis.

    • Conclusions:

    • Nontumorous decreases in 99mTc-GSA accumulation are a notable finding in liver scintigraphy.
    • These decreases are frequently associated with impaired portal venous flow or hepatocellular damage, necessitating careful interpretation for precise regional hepatic function assessment.