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Updated: Jan 10, 2026

Author Spotlight: Genetically Engineered Mouse Models and Pathological Characterization of Neurofibromatosis Type 1 Associated Tumors

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Published on: May 17, 2024

A Diagnostic Pitfall: Retrocaval Nerve Sheath Tumor.

On Wa Ng¹, Fung Him Ng¹, Yuen Fun Mak²

¹Diagnostic and Interventional Radiology Department, Princess Margaret Hospital, Kowloon West Cluster, Hong Kong, HKG.

|November 27, 2025

Summary

A retrocaval lesion initially suspected as metastatic colorectal cancer was diagnosed as a primary nerve sheath tumor. This case emphasizes the importance of tissue diagnosis for FDG-avid lesions in patients with a history of malignancy.

Area of Science:

Oncology
Radiology
Pathology

Background:

A 78-year-old female with resected colorectal adenocarcinoma presented with rising carcinoembryonic antigen (CEA) levels.
Imaging revealed a fluorodeoxyglucose (FDG)-avid retrocaval lesion, suspicious for metastatic disease.

Keywords:

lymph nodes nerve sheath neoplasms retrocaval mass retroperitoneal neoplasms spindle cell neoplasm

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