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Congress: ECR25
Poster Number: C-12754
Type: Poster: EPOS Radiologist (educational)
Authorblock: Z. H. Chen Zhou, A. Hilario Barrio, E. Salvador, A. Cardenas, J. Romero Coronado, C. Lechuga Vázquez, A. Martínez De Aragón Calvo, A. Ramos Gonzalez; Madrid/ES
Disclosures:
Zhao Hui Chen Zhou: Nothing to disclose
Amaya Hilario Barrio: Nothing to disclose
Elena Salvador: Nothing to disclose
Agustin Cardenas: Nothing to disclose
Juan Romero Coronado: Nothing to disclose
Carmen Lechuga Vázquez: Nothing to disclose
Ana Martínez De Aragón Calvo: Nothing to disclose
Ana Ramos Gonzalez: Nothing to disclose
Keywords: Neuroradiology brain, Oncology, MR, Education, Cancer, Metastases, Neoplasia
Learning objectives To review the frequency of non-parenchymal metastases visible on cranial MRI. To provide a checklist of the locations of non-parenchymal metastases and show examples using images from our centre. To review imaging findings that may help in identification.
Read more Background Cranial MRI is the standard imaging method for detecting brain metastases and is increasingly utilized due to the availability of guidelines and recommendations for screening and follow-up.Metastases visible on cranial MRI are not confined to the brain's parenchyma; up to 20% of them can be found in non-parenchymal areas, which may include both intracranial and extracranial structures (Table 1). Therefore, it is essential to have a checklist to ensure that all structures are thoroughly examined and nothing is overlooked.
Read more Findings and procedure details FREQUENT NON-PARENCHYMAL METASTASESBone metastasesBone metastases are the most common non-parenchymal metastases. The three most common primary cancers are breast, lung and prostate.Depending on the anatomy, skull-base metastases may present as five clinical syndromes (Table 2 and Figure 1). The most common mechanism is haematogenous spread, and another possible mechanism is retrograde venous spread via the valveless Batson's venous plexus.Key imaging:Bone metastases may present as diffuse bone involvement or focal lesions, where the hyperintense signal from fatty marrow on T1WI sequences...
Read more Conclusion In conclusion, cranial MRI is essential for detecting both parenchymal and non-parenchymal brain metastases, including those at extracranial sites. Systematic MRI assessment, guided by a structured checklist and specialised imaging techniques, improves detection accuracy. This approach minimises missed diagnoses and supports precise, timely interventions, ultimately improving outcomes for patients with metastatic disease.
Read more References Wilcox JA, Chukwueke UN, Ahn MJ et al. Leptomeningeal metastases from solid tumors: A Society for Neuro-Oncology and American Society of Clinical Oncology consensus review on clinical management and future directions. Neuro Oncol. 2024 Oct 3;26(10):1781-1804. doi: 10.1093/neuonc/noae103. PMID: 38902944; PMCID: PMC11449070. Oh J, Choi SH, Lee E, Shin DJ, Jo SW, Yoo RE, Kang KM, Yun TJ, Kim JH, Sohn CH. Application of 3D Fast Spin-Echo T1 Black-Blood Imaging in the Diagnosis and Prognostic Prediction of Patients with Leptomeningeal Carcinomatosis....
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