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Early neurological deterioration affects 30% of awake craniotomy patients (opens in a new tab)

news-medical.net · 2026-10-27

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The story

Early neurological deterioration affects 30% of awake craniotomy patients

news-medical.net · 2026-10-27

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Every claim holds up. All three claims match what the study reports.

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The source study

Neurological outcomes and survival in patients with intracranial lesions undergoing awake craniotomy: a descriptive retrospective single-center study

Chinese Neurosurgical Journal · 2026Open access

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Claim 1 of 3SupportedA retrospective study of 30 patients undergoing awake craniotomy found that 30% experienced new or worsened neurological dysfunction within 48-72 hours after surgery.View evidenceHide evidence

As stated30% (9 of 30 patients)

Why this verdict

The paper profile describes a single-center retrospective cohort of 30 awake craniotomy patients and reports the predefined primary endpoint: 30.0% (9/30) developed new or aggravated neurological dysfunction within 48–72 hours postoperatively. The story frames this descriptively/associationally and does not claim permanence or causation.

Study evidence

Overall incidence of new or worsened neurological deficits at 48–72 h after awake craniotomy was 30.0% (9/30).30.0% (9/30)

“A single-center descriptive retrospective analysis was performed on 30 patients who received awake craniotomy between January 2019 and November 2024.”

Claim 2 of 3SupportedEarly functional and cognitive score reductions were common, and new-onset aphasia occurred in 10% of patients.View evidenceHide evidence

As stated10% for new-onset aphasia; 30% had at least a 10-point KPS reduction; 26.7% had at least a two-point MMSE decline

Why this verdict

The stated frequencies match the abstract-level profile: KPS reduction 30.0%, MMSE cognitive decline 26.7%, and new-onset aphasia 10.0%. The story also appropriately distinguishes early functional/cognitive reductions from aphasia and does not overstate them as permanent injury.

Study evidence

Overall incidence of new or worsened neurological deficits at 48–72 h after awake craniotomy was 30.0% (9/30).30.0% (9/30)

“A single-center descriptive retrospective analysis was performed on 30 patients who received awake craniotomy between January 2019 and November 2024.”

Claim 3 of 3SupportedNo statistically significant predictors of acute deterioration were identified, and the article says the long-term significance of early postoperative changes remains uncertain.View evidenceHide evidence

Why this verdict

The profile reports that univariate logistic regression identified no statistically significant independent predictors of acute postoperative neurological deficits. It also states that early KPS/MMSE reductions may reflect reversible perioperative factors and that the lack of long-term functional follow-up prevents determining persistence of deficits, supporting the story’s hedged statement that long-term significance remains uncertain.

Study evidence

Overall incidence of new or worsened neurological deficits at 48–72 h after awake craniotomy was 30.0% (9/30).30.0% (9/30)

“A single-center descriptive retrospective analysis was performed on 30 patients who received awake craniotomy between January 2019 and November 2024.”

Study evidence

Univariate logistic regression screening identified no statistically significant independent predictors of acute (48–72 h) postoperative neurological deficits in this cohort.

“Univariate logistic regression screened correlates of acute neurological decline;”

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What the story left out

Important study details the story did not include.

Mapping-success comparison: mapping was completed in 90.0%; successful mapping had a numerically lower acute decline rate than mapping failure (25.9% vs 66.7%), but the difference was not statistically significant (P = 0.20).
The story mentions no significant predictors generally but does not report the specific mapping completion rate or the non-significant numerical mapping-success trend.
From Single-center retrospective cohort; Retrospective cohort; univariate predictor screening
Secondary survival analyses were exploratory/hypothesis-generating only, with median overall survival of 43.0 months and no reliable prognostic factors identified.
The story caveats note that survival analyses were exploratory, but it does not present the survival endpoint, median overall survival, or the finding that no survival prognostic factors were identified.
From Retrospective single-center exploratory survival analysis (time-to-event)
Limitation: heterogeneous intracranial pathologies across the cohort, with findings not stratified by pathology.
The paper profile lists pathological heterogeneity as a limitation, but the story caveats do not mention it.
From Single-center retrospective cohort; Retrospective cohort; univariate predictor screening; Retrospective single-center ex
Limitation: key perioperative covariates, including extent of resection, were missing or unmeasured, limiting adjustment, causal inference, and predictor/prognostic modeling.
The story does not mention missing key covariates such as extent of resection. This is interpretation-relevant for the predictor and survival analyses, especially given the story’s statement about lack of significant predictors.
From Single-center retrospective cohort; Retrospective cohort; univariate predictor screening; Retrospective single-center ex

8 things the story did carry across

Single-center retrospective cohort of 30 patients undergoing awake craniotomy, with acute neurological outcomes assessed at 48–72 hours using KPS, GCS, MMSE, and manual strength testing.
Primary finding: 30.0% (9/30) developed new or worsened acute neurological dysfunction within 48–72 hours.
Phenotype-specific early dysfunction rates: KPS reduction 30.0%, MMSE decline 26.7%, new motor weakness 16.7%, and new-onset aphasia 10.0%.
Authors’ interpretation that many early KPS/MMSE reductions likely reflect reversible perioperative factors such as cerebral edema, fatigue, or residual sedation rather than irreversible focal injury.
Exploratory predictor analysis found no statistically significant predictors of acute postoperative neurological deterioration.
Limitations: retrospective single-center design and small sample size limiting precision, power, and generalizability.
Limitation: no long-term functional follow-up, so persistence or permanence of early deficits cannot be determined.
Limitation: no general-anesthesia or alternate-surgical-approach comparison group, limiting comparative inference.

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study summary

Lead result

secondary data

1Lead resultsecondary dataDescribe short-term (48–72 h) postoperative neurological functional outcomes after awake craniotomy for intracranial lesions in eloquent areas, including categorization of early postoperative dysfunction phenotypes.Single-center retrospective cohortExpand

In plain English

Single-center retrospective cohort (n=30) describing short-term (48–72 h) postoperative neurological outcomes after awake craniotomy for lesions in eloquent cortex. Primary endpoint was new or worsened neurological deficits at 48–72 h measured with KPS, GCS, MMSE, and manual muscle testing; early dysfunction was categorized as transient global systemic decline, focal motor deficit, or isolated language impairment. At 48–72 h, 30.0% (9/30) had new or aggravated neurological dysfunction, most commonly transient global functional decline (KPS reduction 30.0%, MMSE decline 26.7%), while surrogates of permanent focal injury were less frequent (new motor weakness 16.7%; new-onset aphasia 10.0%). Intraoperative mapping was completed in 90.0% (27/30); patients with successful mapping had a numerically lower rate of acute decline (25.9% vs 66.7%) that did not reach statistical significance (P = 0.20). Univariate logistic regression identified no statistically significant predictors of acute postoperative neurological deficits. Authors emphasize that many early KPS/MMSE reductions likely reflect reversible perioperative factors (cerebral edema, fatigue, residual sedation) rather than permanent focal injury. Study limitations include retrospective single-center design, small sample size, pathological heterogeneity, absence of long-term (≥3-month) functional follow-up, lack of a general anesthesia control group, and missing key perioperative covariates (e.g., extent of resection).

Key findings

Overall incidence of new or worsened neurological deficits at 48–72 h after awake craniotomy was 30.0% (9/30).30.0% (9/30)
Most acute impairments reflected transient global functional decline (KPS reduction 30.0%; MMSE decline 26.7%), whereas surrogates of permanent focal injury were less frequent (new motor weakness 16.7%; new-onset aphasia 10.0%).KPS reduction 30.0%; MMSE decline 26.7%; new motor weakness 16.7%; new-onset aphasia 10.0%

“A single-center descriptive retrospective analysis was performed on 30 patients who received awake craniotomy between January 2019 and November 2024.”

What this piece can’t prove

Retrospective single-center design with small sample size (n=30), limiting generalizability and statistical power.
Heterogeneous intracranial pathologies across the cohort; findings not stratified by pathology.
Primary outcome assessed only at 48–72 h; no long-term (≥3-month) functional follow-up to determine persistence of deficits.
No comparison group undergoing general anesthesia or alternate surgical approach.
Key perioperative covariates (including extent of resection) not measured/reported, limiting causal inference and adjustment.
Survival and mortality analyses are exploratory and cannot support prognostic conclusions given study constraints.

2secondary dataExplore (univariate) clinical factors potentially correlated with acute (48–72 h) postoperative neurological deterioration, including mapping success vs failure comparisons.Retrospective cohort; univariate predictor screeningExpand

In plain English

In a single-center retrospective cohort of 30 awake craniotomy patients, univariate logistic regression was used to screen for clinical correlates of acute (48–72 h) postoperative neurological decline. No statistically significant independent predictors were identified; a non-significant numerical difference in acute decline rates was reported for patients with successful intraoperative mapping versus mapping failure.

Key findings

Univariate logistic regression screening identified no statistically significant independent predictors of acute (48–72 h) postoperative neurological deficits in this cohort.
Patients with successful intraoperative awake mapping showed a numerically lower rate of acute neurological decline (25.9%) than patients with mapping failure (66.7%), but this difference was not statistically significant (P = 0.20).25.9% vs 66.7% (P = 0.20)

“Univariate logistic regression screened correlates of acute neurological decline;”

What this piece can’t prove

Small sample size (n = 30) limits statistical power for univariate screening and precludes reliable multivariable modeling.
Very small mapping-failure subgroup (3 patients), making subgroup comparison estimates highly unstable.
Retrospective single-center design with heterogeneous intracranial pathologies reduces external validity.
Key perioperative covariates (including extent of resection) were unmeasured or not reported for inclusion in predictor analyses.
Outcome window limited to 48–72 h; no long-term (≥ 3-month) functional outcome assessments were available to determine permanence of deficits.
All survival-related analyses were exploratory and underpowered; authors caution against clinical prognostic interpretation.

3secondary dataExplore overall survival/all-cause mortality after awake craniotomy in this cohort using Kaplan–Meier/log-rank/Cox models (explicitly hypothesis-generating only).Retrospective single-center exploratory survival analysis (time-to-event)Expand

In plain English

Secondary, exploratory time-to-event analysis of overall survival (OS) and all-cause mortality in a single-center retrospective cohort of 30 patients who underwent awake craniotomy (cases from Jan 2019–Nov 2024) with follow-up completed Feb 28, 2025. Kaplan–Meier estimation, log-rank subgroup comparisons, and Cox proportional hazards regression were applied; median OS was reported as 43.0 months and no subgroup or Cox-model associations reached statistical significance. All survival results are explicitly framed as descriptive and hypothesis-generating given the small sample size, pathological heterogeneity, and missing key covariates.

Key findings

Median overall survival for the cohort was 43.0 months.Median OS = 43.0 months
No statistically significant subgroup differences or Cox regression–identified prognostic factors were found in these exploratory survival analyses.No significant associations reported

“Secondary exploratory endpoints included overall survival and all-cause mortality, with follow-up completed by February 28, 2025.”

What this piece can’t prove

Retrospective single-center design.
Small sample size (n=30) reduces statistical power for time-to-event and multivariable analyses.
Pathological heterogeneity of intracranial lesions limits generalizability and subgroup inference.
Missing/unmeasured key perioperative covariates (including extent of resection) not accounted for in survival models.
No contemporaneous control group (e.g., general anesthesia cases) for comparative survival inference.
Abstract provides limited methodological detail for survival analyses (censoring rules, covariate selection, PH assumption checks).
Authors explicitly state survival results are descriptive and hypothesis-generating with no definitive prognostic interpretation.

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