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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...

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Manual Segmentation of the Human Choroid Plexus Using Brain MRI
04:25

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Published on: December 15, 2023

Choroid plexus tumours: classification, MR imaging findings and pathological correlation.

Chenggong Yan1, Yikai Xu, Jie Feng

  • 1Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangdong, China.

Journal of Medical Imaging and Radiation Oncology
|April 5, 2013
PubMed
Summary

Choroid plexus tumours (CPTs) are rare intraventricular neoplasms. MR imaging shows inhomogeneity on T2-weighted images and flow void, suggesting CPTs, with thin capsules aiding classification.

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Area of Science:

  • Neuroradiology
  • Oncology
  • Neurosurgery

Background:

  • Choroid plexus tumours (CPTs) are rare intraventricular neoplasms.
  • CPTs have a high propensity for surgical bleeding.
  • Understanding CPTs' MR imaging characteristics is crucial for surgical planning.

Purpose of the Study:

  • To summarize the MR imaging features of 13 pathologically confirmed CPT cases.
  • To correlate MR imaging findings with histological subtypes.
  • To identify imaging characteristics suggestive of CPTs.

Main Methods:

  • Retrospective review of MR images from 13 CPT patients.
  • Evaluation of tumour location, size, shape, internal architecture, margin, and enhancement.
  • Analysis of signal intensity characteristics and comparison across histological subtypes.

Main Results:

  • Lesions were located in the lateral ventricles (7), fourth ventricle (5), and cisterna magna (1).
  • Mean tumour size was 5.0 cm; parenchyma showed mixed inhomogeneous signals on T2-weighted images.
  • All lesions demonstrated moderate to marked postcontrast enhancement; 'flow void' was present in most tumours.

Conclusions:

  • Inhomogeneous T2-weighted signals and 'flow void' are suggestive of CPTs.
  • Presence of a thin capsule, peritumoural oedema, and necrosis aids in CPT classification.
  • Detailed MR imaging analysis is vital for diagnosing and managing CPTs.