FDG-PET/CT-Positive Foreign Body Granuloma Mimicking Colon Cancer Recurrence: Case Report

Colorectal cancer (CRC) is the third most prevalent malignancy worldwide, and one of the most common causes of cancer-related deaths. The main tumor-related prognostic factor after surgical resection is initial pathologic staging and lymph node involvement is a major determinant of disease recurrence. The addition of adjuvant chemotherapy in stage III patients undergoing surgical resection decreases tumor recurrence by around 40% to 50%. However, a significant proportion of patients still experience systemic recurrence. In CRC, 18F-FDGfluorodeoxyglucose (18F-FDG-PET-CT) plays a key role in the detection of recurrent disease in post-therapy assessment of residual masses and patient staging before surgical resection of liver metastases. We report the case of a 52-year-old patient with stage III colorectal cancer, who underwent surgical resection and completed adjuvant chemotherapy, followed by imaging techniques (Fluorine-18-FDG PET-CT and magnetic resonance) mimicking early peritoneal and ovarian recurrence.


Germano de Sousa Leão, Gabriele Taumaturgo Mororó, Andressa Marques Campelo de Carvalho, Sávia Raquel Costa Normando, Sabas Carlos Vieira and Danilo da Fonseca Reis Silva

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