a b s t r a c tFat necrosis of the breast is a benign condition that most commonly occurs as the result of trauma. The radiographic and clinical significance of fat necrosis of the breast is that it may mimic malignancy.We present a case of false positive FDG PET/CT scan caused by fat necrosis and mimics local recurrence of breast carcinoma 3 years after radical mastectomy.Physicians must be aware of fat necrosis as a potential pitfall for PET/CT. Fat necrosis must be considered in the differential diagnosis of hypermetabolic breast masses in patients who previously had mastectomy or mammoplasty. La necrosis grasa puede asemejarse a una recurrencia local del cáncer de mama en la PET/TC con FDGPalabras clave: FDG PET/TC Carcinoma de mama Necrosis grasa Falso positivo r e s u m e n La necrosis grasa de mama constituye una situación benigna que se produce de forma común como resultado de un trauma. El significado radiográfico y clínico de la necrosis grasa puede asemejarse a una neoplasia.Presentamos el caso de un resultado falso positivo de la PET/TC con FDG debido a una necrosis grasa, y su semejanza con una recurrencia local de carcinoma de mama a los 3 años de una mastectomía radical.Los facultativos deben ser conscientes de que la necrosis grasa puede constituir una limitación para el estudio PET/TC. La necrosis grasa debe considerarse en el diagnóstico diferencial de las masas hipermetabólicas de mama en pacientes sometidas previamente a mastectomía o mamoplastia.
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