Dendritic fibromyxolipoma is a rare recently described benign soft tissue tumor, which may be misinterpreted histologically as myxoid liposarcoma or myxoid malignant fibrous histiocytoma. We describe FDG PET/CT and MRI findings of a dendritic fibromyxolipoma incidentally detected in a case with rectal adenocarcinoma. The dendritic fibromyxolipoma showed inhomogeneous FDG uptake with SUVmax of 4.0 mimicking malignancy.
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