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Eur Radiol. 2013 Jun;23(6):1467-77. doi: 10.1007/s00330-012-2762-1. Epub 2013 Jan 12.

Immediate post-operative MRI suggestive of the site and timing of glioblastoma recurrence after gross total resection: a retrospective longitudinal preliminary study.

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  • 1Department of Neurosurgery, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Avenue Hippocrate 10, 1200 Brussels, Belgium.

Abstract

OBJECTIVES:

To retrospectively identify morphological and physiological post-operative magnetic resonance imaging (MRI) characteristics predictive of glioblastoma recurrences after gross total resection (gross-TR).

METHODS:

Resection margins of 24 glioblastoma were analysed immediately post-operatively (MRI ≤ 2 h) and early post-operatively (24 h ≤ MRI ≤ 48 h), and subdivided into areas with and without subtle contrast enhancement previously considered non-specific. On follow-up MRI, tumour regrowth areas were subdivided according to recurrence extent (focally/extended) and delay (≤6 and ≥12 months). Co-registration of pre-operative, immediately post-operative and early post-operative MRI with the first follow-up MRI demonstrating recurrence authorised their morphological (contrast enhancements) and physiological (rCBV) characterisation.

RESULTS:

Morphologically, on immediately post-operative MRI, micro-nodular and frayed enhancements correlate significantly with early recurrences (≤6 months). After gross-TR the absence of these enhancements is associated with a significant increase in progression-free survival (61 vs 15 weeks respectively) and overall survival (125 vs 51 weeks respectively). Physiologically, areas with a future focal recurrence have a trend toward higher rCBV than other areas.

CONCLUSION:

Immediately post-operative topography of micro-nodular and frayed enhancements is suggestive of recurrence location and delay. Absence of such enhancements is associated with a fourfold increase in progression-free survival and a 2.5-fold increase in overall survival.

KEY POINTS:

• Immediately post-operative MRI reveals contrast enhancement after glioblastoma gross total resection. • Immediately post-operative micro-nodular and frayed enhancement correlate with early recurrence. • Absence of micro-nodular/frayed enhancement is associated with 61 weeks' progression-free survival. • Absence of micro-nodular/frayed enhancement is associated with 125 weeks' overall survival.

PMID:
23314599
[PubMed - indexed for MEDLINE]
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