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Dynamic MR imaging of hepatic adenomas with pathologic correlation
T Miyazaki1, Y Yamashita, H Yamamoto
1Department of Radiology, Kumamoto University School of Medicine, Japan.
Summary
Dynamic magnetic resonance (MR) imaging reveals distinct enhancement patterns for hepatic adenomas (HAs). This technique differentiates HAs from other liver lesions by showing early homogeneous enhancement and delayed contrast uptake.
Area of Science:
- Radiology
- Medical Imaging
- Hepatology
Background:
- Hepatic adenomas (HAs) are benign liver tumors with variable conventional MR imaging findings.
- Dynamic MR imaging (DMI) has not been previously reported for HA evaluation.
Observation:
- Two patients with HAs underwent DMI using gadolinium diethylenetriaminepentaacetic acid (Gd-DTPA).
- Case 1 HA contained fibrosis and showed delayed enhancement.
- Case 2 HA demonstrated typical enhancement patterns.
Findings:
- Typical HAs exhibit homogeneous enhancement in the early dynamic phase and prolonged enhancement in the late phase.
- Fibrotic HAs may show delayed enhancement.
- Contrast enhancement patterns differ from hemangiomas and hepatocellular carcinomas (HCCs).
Implications:
- DMI provides a valuable tool for characterizing hepatic adenomas.
- This technique may aid in differentiating HAs from other liver lesions.
- Further studies are warranted to establish DMI protocols for HA diagnosis.