Rectosigmoid Intussusception Secondary to Colorectal Carcinoma Imaged With 18 F-FDG PET/CT.

Clin Nucl MedOct 20, 2026 (epub)
Case ReportNuclear MedicineRadiology (Diagnostic)Oncology (Medical)

Burak Demir, Merve Atalay, Nihat Kilicaslan

✦ AI-curated · Sources linked

Case in brief

An 80-year-old man with rectosigmoid adenocarcinoma underwent 18F-FDG PET/CT. The study showed rectosigmoid intussusception, with a target sign visible on both PET and CT, as well as synchronous FDG-avid lung metastases. MRI subsequently confirmed the anatomical findings. The hybrid imaging demonstrated the bowel abnormality and metastatic disease in the same examination, contributing to whole-body staging and clinical management.

What made this case unusual

The intussusception’s target sign was apparent on both the PET and CT components, while the examination also identified FDG-avid lung metastases.

Diagnostic / clinical pearl

In a patient with colorectal carcinoma, a target sign on hybrid PET/CT can reveal intussusception while the same study assesses disease beyond the primary site.

Source

PubMed · PMID 42912553

Published in Clin Nucl Med. This summary was written by xxcode from the publication's abstract and metadata. It is not peer reviewed and is not a substitute for the original article. For clinical decisions, review the original publication.

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