Back to the list
Congress: ECR25
Poster Number: C-22826
Type: Poster: EPOS Radiologist (educational)
DOI: 10.26044/ecr2025/C-22826
Authorblock: D. Barahona, J. Torres, F. B. Cañas, P. Araneda, N. Arenas, I. Adlerstein; Santiago/CL
Disclosures:
Daniela Barahona: Nothing to disclose
Jorge Torres: Nothing to disclose
Fernanda Blaskovic Cañas: Nothing to disclose
Paula Araneda: Nothing to disclose
Nicolas Arenas: Nothing to disclose
Isabel Adlerstein: Nothing to disclose
Keywords: Abdomen, Lymph nodes, Oncology, CT, MR, PET-CT, Education, Cancer, Education and training, Metastases
Learning objectives Propose a practical method for evaluating lymphatic dissemination pathways of abdominal and pelvic neoplasms using anatomical illustrations and imaging (CT, MRI, PET/CT). Distinguish between locoregional and metastatic lymphatic dissemination. Assist in identifying secondary lymphadenopathy when evaluating abdominopelvic neoplasms.
Read more Background Cancer spreads via local invasion or distant routes, including lymphatic and hematogenous pathways. Lymphatic spread, often following an orderly pattern, allows for staging by tracking tumor progression through lymph node levels stepwise. Differentiating between locoregional and metastatic spread is vital for accurate staging and treatment planning. Imaging techniques such as CT, MRI, and PET/CT enable detection of lymphatic dissemination in both common and atypical sites, aiding proper staging, management, and prognosis.
Read more Findings and procedure details This presentation examines the lymphatic dissemination patterns of various neoplasms, including hepatobiliary, gastrointestinal, urological, gynecological, neuroendocrine tumors, lymphoma, melanoma, gastrointestinal stromal tumors (GIST), and sarcomas, utilizing PET/CT, CT, and MRI imaging techniques.Classification of Lymph Node Metastases: Locoregional Metastases (N): Nodes near the primary tumor within direct lymphatic drainage, considered a local tumor extension. Specific nodal chains depend on tumor location. These nodes are seen as an extension of the tumor and typically involve specific nodal chains, depending on the tumor's location....
Read more Conclusion Understanding the patterns of lymphatic spread and the preferred dissemination routes based on tumor type is crucial for radiologists and clinicians engaged in the multidisciplinary management of patients with abdominopelvic neoplasms. This knowledge is vital for accurate staging, therapeutic planning, and prognostic evaluation. Additionally, integrating multimodal imaging techniques, especially PET/CT, improves the detection of both common and rare patterns of lymphatic dissemination. [fig 20]
Read more References McMahon CJ, Rofsky NM, Pedrosa I. Lymphatic metastases from pelvic tumors: anatomic classification, characterization, and staging. Radiology. 2010;254(1):31-46. doi: 10.1148/radiol.2541090361.  Pedersen CK, Srinivasa Babu A. Understanding the lymphatics: review of the N category in the updated TNM staging of cancers of the digestive system. AJR Am J Roentgenol. 2020;215(1):58-68. doi: 10.2214/AJR.19.22636.  Pedersen CK, Srinivasa Babu A. Understanding the lymphatics: an updated review of the N category of the AJCC 8th edition for urogenital cancers. AJR Am J Roentgenol. 2021;217(2):368-377. doi: 10.2214/AJR.20.22997.  O'Shea A,...
Read more
GALLERY