ArticleRadiology case reports2026
Popliteal fossa metastasis from rectal carcinoma in a young adult: A rare case report.
Article in Radiology case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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6 authors.
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Abstract
Signet-ring cell carcinoma (SRCC) of the rectum is a rare and aggressive subtype of colorectal cancer, typically metastasizing to regional lymph nodes, peritoneum, and liver. Metastasis to the popliteal fossa is exceedingly rare. We report a 27-year-old male with biopsy-proven rectal SRCC who developed a painful soft tissue mass in the left popliteal fossa within 1 year despite ongoing chemoradiotherapy. MRI demonstrated a heterogeneous mass with central necrosis, peripheral enhancement, and diffusion restriction. ¹⁸F-FDG PET/CT revealed peripheral FDG avidity (SUVmax 2.8). Ultrasound-guided core biopsy confirmed metastatic adenocarcinoma of colorectal origin. This case highlights an extremely rare metastatic pattern of rectal SRCC and emphasizes the importance of a multimodality imaging approach, including ultrasound, MRI, and PET/CT, in evaluating atypical soft tissue lesions in oncology patients.
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