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Updated: May 5, 2026
Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
Minimally invasive surgical evacuation confers a mortality benefit in patients with moderate-sized putaminal
Ahmed Kashkoush1,2, Daniel T Lilly1, Robert Winkelman1
11Department of Neurological Surgery, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland; and.
Objective:
Minimally invasive surgical (MIS) evacuation of basal ganglia hemorrhages has not demonstrated efficacy compared with medical management. Prior study from this group has suggested that MIS evacuation of moderate-sized putaminal intracranial hemorrhages (pICHs) using tubular retractors is associated with favorable functional outcomes. The authors hypothesized that postoperative functional outcomes were improved in patients with moderate-sized pICH compared with those of a matched cohort of medically managed patients.
Methods:
The authors performed a single-center retrospective review of patients admitted with non-lesional pICH between 10 and 50 mL from 2013 to 2024. Patients who underwent MIS evacuation were 1:1 matched to medically managed patients based on volume and ICH score. The main outcome was the utility-weighted modified Rankin Scale (uw-mRS) score obtained within 1 year of admission. Regional pICH extension patterns were evaluated by stereotactically localizing pICH volumes in an anatomical coordinate frame.
Results:
Sixty-six patients (33 medical and 33 surgical) were included. The uw-mRS score was similar in the medical and surgical cohorts (mean 0.33 vs 0.44, p = 0.174). Mortality was higher in the medically managed group (24% [medical] vs 3% [surgical], p = 0.010). The median ICU length of stay (LOS) was 3 days shorter in the surgical arm (7 vs 4 days, p = 0.045). Anteromedial extension in the region of the anterior limb of the internal capsule and caudate predicted poor outcome (mRS scores 4-6) in surgically managed patients (area under the curve [AUC] 0.74, p = 0.006), while posterior and superior extension in the region of the frontal lobe predicted poor outcomes in medically managed patients (AUC 0.74, p = 0.045). The incremental cost-effectiveness ratio was $68,462.55 per quality-adjusted life year for surgical evacuation compared with medical management.
Conclusions:
In this study, MIS evacuation of moderate-sized pICHs was associated with improved mortality rates, shorter ICU LOS, and cost-effectiveness. Putaminal ICH morphology can differentially predict functional outcome based on management strategy.
Insights
Minimally invasive surgery for moderate putaminal hemorrhages improved survival and reduced hospital stays compared to medical management. This approach is also cost-effective, though outcomes depend on hemorrhage location.
Area of Science:
- Neurosurgery
- Neurology
- Medical Technology
Background:
- Minimally invasive surgical (MIS) evacuation for basal ganglia hemorrhages has shown limited efficacy.
- Previous research suggests MIS evacuation of moderate putaminal intracranial hemorrhages (pICHs) may yield favorable outcomes.
- This study aimed to compare functional outcomes of MIS evacuation versus medical management for moderate pICHs.
Purpose of the Study:
- To test the hypothesis that MIS evacuation improves functional outcomes in patients with moderate-sized pICH compared to medical management.
- To evaluate mortality rates, intensive care unit (ICU) length of stay (LOS), and cost-effectiveness.
- To analyze the predictive value of pICH morphology on functional outcomes based on management strategy.
Main Methods:
- Retrospective review of 66 patients with non-lesional pICH (10-50 mL) from 2013-2024.
- 1:1 matching of MIS evacuation patients with medically managed patients based on volume and ICH score.
- Primary outcome: utility-weighted modified Rankin Scale (uw-mRS) at 1 year; secondary analysis of pICH extension patterns.
Main Results:
- No significant difference in uw-mRS scores between medical (0.33) and surgical (0.44) groups (p=0.174).
- Surgical group had significantly lower mortality (3% vs 24%, p=0.010) and shorter ICU LOS (4 vs 7 days, p=0.045).
- Anteromedial extension predicted poor outcomes in surgical patients, while posterior/superior extension predicted poor outcomes in medical patients. Cost-effectiveness was $68,462.55 per QALY.
Conclusions:
- MIS evacuation of moderate pICHs is associated with improved survival, reduced ICU LOS, and cost-effectiveness.
- Putaminal ICH morphology can predict functional outcomes differently depending on whether MIS or medical management is used.
- MIS evacuation represents a viable treatment option for select moderate-sized pICHs.
