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Delayed computed tomography contrast enhancement patterns in biopsy proven cases
D R Blatt1, W A Friedman, O F Agee
1Department of Neurological Surgery, University of Florida College of Medicine, Gainesville.
Neurosurgery
|April 1, 1993
Summary
Postoperative computed tomography scans after stereotactic brain biopsy show delayed contrast enhancement in most lesions. This enhancement can increase lesion size and alter appearance, potentially impacting treatment planning for neurosurgery.
Area of Science:
- Neurosurgery
- Neuroradiology
- Medical Imaging
Background:
- Stereotactic brain biopsy is a common neurosurgical procedure.
- Postoperative computed tomography (CT) scans are routinely used to detect hemorrhage.
- Delayed contrast enhancement on postoperative CT scans is frequently observed.
Purpose of the Study:
- To assess changes in contrast enhancement patterns after stereotactic brain biopsy.
- To determine if enhancement changes relate to lesion pathology or clinical factors.
- To evaluate the impact of delayed enhancement on lesion assessment.
Main Methods:
- Review of pre- and postoperative CT scans from 89 patients.
- Analysis of contrast enhancement patterns and lesion characteristics.
- Correlation of imaging findings with time delay between scans.
Main Results:
- 81% of lesions showed similar or increased enhancement post-biopsy.
- Enhancement area increased in 83% of lesions.
- Lesion borders became less sharp, and ring-enhancing lesions became homogeneous over time.
Conclusions:
- Delayed contrast enhancement is common after stereotactic brain biopsy.
- Enhancement patterns change significantly over time, potentially obscuring the true lesion extent.
- Delayed CT scans after contrast administration may improve resolution for poorly enhancing lesions in CT-guided procedures.