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Focal fat spared area in the liver masquerading as hepatic metastasis on F-18 FDG PET imaging

In Clinical Nuclear Medicine
By: Purandare NC.
Contributor(s): Pathak S | Arora A | Shah S | Rajnish A | drvrangarajan@gmail.com | Rangarajan V.
Material type: materialTypeLabelArticleSeries: Vol 33 Issues 11.Publisher: 2008Description: 802-805.Subject(s): | PET Imaging | F-18 FDG | Metastasis | Hepatic Metastasis | Liver | DDC classification: In: Clinical Nuclear MedicineSummary: Fatty infiltration of the liver is not an uncommon imaging finding with modalities like ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI). However, when it manifests as a focal fatty change or areas of focal fat sparing, an appearance of a mass lesion is produced. Focal tracer uptake seen in the liver on F-18 fluorodeoxyglucose-positron emission tomography (FDG-PET) when it is performed as a part of a metastatic work up for colorectal cancer is highly suggestive of hepatic metastasis. We present an unusual finding of focal FDG uptake in a fat-spared area in the liver masquerading as a hepatic metastasis.
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Fatty infiltration of the liver is not an uncommon imaging finding with modalities like ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI). However, when it manifests as a focal fatty change or areas of focal fat sparing, an appearance of a mass lesion is produced. Focal tracer uptake seen in the liver on F-18 fluorodeoxyglucose-positron emission tomography (FDG-PET) when it is performed as a part of a metastatic work up for colorectal cancer is highly suggestive of hepatic metastasis. We present an unusual finding of focal FDG uptake in a fat-spared area in the liver masquerading as a hepatic metastasis.

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