Malignant MCA Stroke - Decompressive Hemicraniectomy Decision

Algorithm Steps

1. ▶

   Start

   Large MCA Territory Stroke

   CT/MRI showing ≥50% MCA territory infarction with developing edema

   1. ●

      Action

      Confirm Malignant Features

      Imaging criteria for malignant MCA infarction

      • Infarct ≥50% MCA territory on CT/DWI
      • Volume >145 mL on DWI (ESCAPE criteria)
      • Signs of early edema/sulcal effacement
      • Midline shift developing
      1. ◆

         Decision

         Patient Age?

         Age stratification affects recommendations

         1. ●

            Action

            Age ≤60 Years

            Strong evidence for benefit (AHA Class IIa, LOE A)

            • Pooled analysis: mortality 22% vs 71% (NNT=2)
            • mRS ≤4 at 1 year: 75% vs 24%
            • mRS ≤3 at 1 year: 43% vs 21%
            • DECIMAL, DESTINY, HAMLET trials
            1. ◆

               Decision

               Time from Symptom Onset <48h?

               Surgical window based on trial criteria

               1. ●

                  Action

                  Within Surgical Window

                  Proceed with evaluation for surgery

                  1. ◆

                     Decision

                     Clinical Criteria Met?

                     Assess neurological status

                     • NIHSS ≥15 (or >20 for dominant hemisphere)
                     • GCS ≥6 (most trials)
                     • Decline in consciousness (GCS drop)
                     • New pupillary changes
                     1. ◆

                        Decision

                        Any Contraindications?

                        Assess for absolute/relative contraindications

                        • Pre-stroke mRS ≥2 (functional dependence)
                        • Terminal illness
                        • Coagulopathy (correct first)
                        • Bilateral fixed pupils (controversial)
                        1. ●

                           Action

                           Goals of Care Discussion

                           Family/surrogate decision-making

                           • Explain survival vs disability trade-off
                           • Most survivors have moderate-severe disability
                           • Quality of life assessment
                           • Patient's known wishes if available
                           • Shared decision-making essential
                           1. ●

                              Action

                              Proceed to Hemicraniectomy

                              Decompressive surgery

                              • Bone flap ≥12 cm diameter
                              • Duraplasty (dura opened and expanded)
                              • No hematoma evacuation needed
                              • Bone flap stored for later cranioplasty
                              1. ●

                                 Action

                                 Post-Operative Care

                                 ICU management after hemicraniectomy

                                 • Continue ICP monitoring if needed
                                 • DVT prophylaxis after hemostasis
                                 • Early nutrition
                                 • Cranioplasty typically at 6-12 weeks
                                 1. ✓

                                    Outcome

                                    Surgical Outcome

                                    Expected: reduced mortality, but significant disability likely

                           2. ●

                              Action

                              Conservative/Medical Management

                              If surgery not pursued

                              • ICP management (osmotherapy, positioning)
                              • Comfort-focused care if appropriate
                              • ICU monitoring
                              • May reconsider if condition changes
                              1. ✓

                                 Outcome

                                 Conservative Outcome

                                 Continue supportive care; high mortality without surgery

               2. ⚠

                  Warning

                  ⚠️ Beyond 48h Window

                  Limited evidence beyond 48h

                  • Trial data limited to <48h
                  • Consider on case-by-case basis
                  • May still benefit if herniation imminent
                  • Discuss with neurosurgery
         2. ●

            Action

            Age >60 Years

            DESTINY II showed survival benefit but higher disability

            • DESTINY II: survival 43% vs 17%
            • mRS ≤4: 38% vs 18% at 6 months
            • BUT: most survivors have mRS 4-5
            • Goals of care discussion critical