Overview
Malignant middle cerebral artery infarction (MMI) is characterized by rapid neurological deterioration due to extensive edema and increased intracranial pressure, often leading to high mortality rates 1. Decompressive hemicraniectomy (DC) is a surgical intervention aimed at reducing secondary brain injury and improving outcomes in selected patients 12.Diagnosis
Clinical Presentation: Rapid decline in consciousness, focal neurological deficits, and signs of increased intracranial pressure 1.
Imaging: MRI or CT showing large MCA territory infarction with significant mass effect and edema 1.
Intracranial Pressure Monitoring: Elevated ICP values indicative of severe brain swelling 3.
Radiological Features: Midline shift, involvement of additional vascular territories, and septum pellucidum displacement ≥7.5 mm 2.Management
Decompressive Hemicraniectomy (DC): Indicated in patients meeting specific criteria, typically performed within 48-72 hours post-stroke onset 12.
Timing: Median timing of DC is around 38 hours from stroke onset, though earlier intervention may be beneficial 1.
Selection Criteria: Younger age (<55 years), involvement of additional vascular territories, septum pellucidum displacement ≥7.5 mm, diabetes, rapid infarct growth, and temporal lobe involvement 2.
Postoperative Monitoring: Continuous ICP monitoring and assessment of neurological status (GCS, pupillary responses) 3.Special Populations
Age: Younger patients (<55 years) are more likely to undergo DC and have better outcomes 2.
Comorbidities: Diabetes is identified as a predictive factor for DC, suggesting its impact on patient selection 2.Key Recommendations
Consider Decompressive Hemicraniectomy in patients with malignant MCA infarction who meet specific criteria (younger age, additional vascular territory involvement, significant midline shift, rapid infarct growth) within 48-72 hours of stroke onset (Evidence: Moderate) 2.
Monitor Intracranial Pressure immediately post-hemicraniectomy to assess decompression efficacy and predict survival outcomes (Evidence: Weak) 3.
Select Patients Based on Radiological and Clinical Features including septum pellucidum displacement and temporal lobe involvement, alongside clinical deterioration (Evidence: Moderate) 2.References
1 Alhamdan M, Corell A, Holmgren K, Muncan E, Lindvall P, Koskinen LO et al.. Indications, Timing, and Outcome of Decompressive Craniectomy in Malignant Middle Cerebral Artery Infarction: A Swedish Multicenter Study. World neurosurgery 2026. link
2 Kamran S, Salam A, Akhtar N, D'soza A, Shuaib A. Predictors of decompressive hemicraniectomy in malignant middle cerebral artery stroke. Neurosurgical review 2019. link
3 Jeon SB, Park JC, Kwon SU, Kim YJ, Lee S, Kang DW et al.. Intracranial Pressure Soon After Hemicraniectomy in Malignant Middle Cerebral Artery Infarction. Journal of intensive care medicine 2018. link