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Magnetic resonance imaging of siderotic hepatic adenoma
Abstract:
This is a case report of a patient with hepatic adenoma who had a magnetic resonance imaging (MRI) appearance mimicking that of adenomatous hyperplasia. The adenoma was hyperintense on T1-weighted image (T1WI) and hypointense on T2-weighted image (T2WI). Pathologically, iron deposition in hepatocytes and Kupffer cells was proved by Prussian blue stain that caused hypointensity on T2WI. Iron deposition in hepatic adenomatous hyperplasia has been documented in the past, but there are no reports of siderotic adenoma in the literature. We suggest that siderotic hepatic adenoma be included in the differential diagnosis when MRI appearance is hyperintense on T1WI and hypointense on T2WI.
Insights
This case report identifies a rare siderotic hepatic adenoma, presenting a unique magnetic resonance imaging (MRI) appearance. This finding suggests including siderotic hepatic adenoma in differential diagnoses for specific MRI signal characteristics.
Area of Science:
- Hepatobiliary imaging
- Gastrointestinal pathology
- Radiology
Background:
- Hepatic adenomas are benign liver tumors with variable imaging features.
- Magnetic resonance imaging (MRI) is crucial for characterizing liver lesions.
- Differentiating hepatic adenoma from adenomatous hyperplasia can be challenging.
Observation:
- A case of hepatic adenoma demonstrated MRI signal intensities mimicking adenomatous hyperplasia.
- The lesion was hyperintense on T1-weighted imaging (T1WI) and hypointense on T2-weighted imaging (T2WI).
- Pathological examination confirmed iron deposition within hepatocytes and Kupffer cells, explaining the T2WI hypointensity.
Findings:
- This case represents the first reported instance of siderotic hepatic adenoma in the literature.
- The characteristic MRI findings (T1WI hyperintensity, T2WI hypointensity) are attributed to iron deposition.
- Prussian blue staining confirmed significant iron accumulation in the adenoma.
Implications:
- Siderotic hepatic adenoma should be considered in the differential diagnosis of liver lesions with T1WI hyperintensity and T2WI hypointensity.
- Recognizing this entity can prevent misdiagnosis and guide appropriate patient management.
- Further research may elucidate the prevalence and specific etiologies of siderotic hepatic adenoma.