We report the PET-CT appearance of actinomycosis in a 76-year-old man with a history of squamous cell carcinoma of the esophagus. The patient was initially treated with neoadjuvant chemoradiation therapy followed by esophagectomy and gastric pullup. Hybrid PET-CT was performed 20 months after completion of treatment using a Siemens Biograph scanner 45 minutes after intravenous administration of 15 mCi of F-18 FDG. PET-CT demonstrated intense hypermetabolism to the left of the anastomosis, corresponding to a soft tissue mass on CT. The patient underwent biopsy of the mass 10 days after PET-CT examination that confirmed actinomycosis with no evidence of recurrent disease.
We present 4 cases of cosmetic-related changes on 18F-FDG PET/CT. These cases represent post-treatment changes from facial juvederm injection, silicone injection in the chest wall and gluteal areas, paraffin injection in the gluteal region, and liposuction. Recognition of cosmetic-related changes and their appearance on PET and CT will help to avoid potential false-positive interpretations.
We report F-18 FDG PET-CT appearance of biopsy-proven intramuscular myxoma (IM) in a 69-year-old woman who presented with a left thigh mass. The tumor appears as a well-defined, hypodense mass with thin septation on CT images and mild uptake on PET images. IMs are rare benign myxoid tumors characterized by a paucity of cells, diminished vascularity, and minimal mitotic figures. They most often present as slow-growing, painless, deep-seated intramuscular masses. The mainstay of treatment is surgical resection.
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