Skip to main content

Journal Club

Tumor/Skull Base

Endoscopic endonasal versus transcranial surgery for primary resection of craniopharyngiomas based on a new QST classification system: a comparative series of 315 patients

Journal of Neurosurgery | 2021

Rapid review note

Journal Club is a rapid, AI-assisted appraisal layer. It highlights study design, effect estimates, and practice relevance, but it is still a briefing, not a replacement for the paper.

For education only. Not medical advice.

Paper snapshot

Rapid study overview

Open paper

DOI

10.3171/2020.7.JNS20257

PMID

N/A

PICO

Population

315 patients undergoing primary craniopharyngioma resection, stratified by QST tumor type into Q-CP, S-CP, and T-CP groups.

Intervention

Endoscopic endonasal approach.

Comparator

Transcranial approach.

Outcomes

Gross-total resection, recurrence, visual outcomes, endocrinologic outcomes, and approach-specific complications.

Design

Type

Retrospective comparative single-center series

Randomized

No

Multicenter

No

Blinded

N/A

Follow-up

Mean follow-up about 85 to 90 months

Primary endpoint

Surgical outcomes by approach within each QST tumor type.

Secondary endpoints

  • Visual improvement and deterioration
  • Recurrence-free survival
  • CSF leak, nasal complications, and endocrine morbidity

Practice impact

What this means

This paper is useful because it avoids the lazy question of 'endonasal or transcranial?' and asks 'for which craniopharyngioma type?' Endoscopy looked particularly good for Q-CP tumors and for visual outcomes overall, but it also carried more CSF leak and nasal complications. The right takeaway is tailored approach selection, not dogma.

Bottom line

Craniopharyngioma approach should be individualized by tumor type: endoscopy appears especially favorable for Q-CP tumors and visual outcomes, but its higher CSF leak and nasal complication rates prevent a one-size-fits-all recommendation.

Strength of evidence

low

Recommendation

consider change

Why it matters

  • The paper offers a clinically useful subtype-based framework rather than a simple overall winner.
  • Endoscopy improved visual outcomes overall and Q-CP oncologic results in particular.
  • Retrospective design and higher endoscopic approach morbidity limit certainty.

What would change my mind

  • Prospective comparative data showing that the subtype-specific endoscopic advantages persist after stricter control for anatomy and surgeon preference.
  • Modern reconstructive data demonstrating that CSF leak penalties can be reduced enough to strengthen a broader endoscopic recommendation.

Critical appraisal

How strong is the paper?

Methods critique

Risk of bias

This was a retrospective nonrandomized comparison, so approach selection was driven by tumor anatomy and surgeon judgment rather than random allocation.

Confounding

The QST classification improves comparability, but tumors best suited to endoscopy were still more likely to receive endoscopy, which can inflate apparent benefits for certain subtypes.

Missing data

Patients with recurrent tumors, radiotherapy, incomplete data, or loss to follow-up were excluded, which may have biased the cohort toward cleaner, more favorable cases.

Multiplicity

The paper reports many subgroup comparisons by tumor type and outcome domain, so statistically significant findings should be weighed against the large number of tested contrasts.

Notes

  • The main comparative insight is subtype specific rather than a universal winner.
  • Visual outcomes favored endoscopy overall, but CSF leak and nasal morbidity were higher with endoscopy.
  • The clearest endoscopic advantage was in Q-CP tumors.

Stats check

NNT

N/A

Effect sizes

  • Overall gross-total resection was similar: 91.2% with endoscopy versus 90.5% with transcranial surgery (p=0.85).
  • Visual improvement favored endoscopy: 61.6% versus 35.8% (p=0.01), and visual deterioration was lower at 1.6% versus 11.0% (p<0.001).
  • For Q-CP tumors, endoscopy improved gross-total resection to 97.4% versus 85.7% (p=0.017) and reduced recurrence to 2.6% versus 12.2% (p=0.001).

Absolute effects

  • CSF leak occurred in 12.0% with endoscopy versus 0.5% with transcranial surgery.
  • Nasal complications occurred in 9.6% with endoscopy versus 0.5% with transcranial surgery.
  • New hypopituitarism for Q-CP tumors was 28.9% with endoscopy versus 57.1% with transcranial surgery.

Concerns

  • Subtype analyses are informative but still retrospective and prone to selection bias.
  • The increased CSF leak burden is clinically important and tempers enthusiasm for universal endoscopy.
  • The paper does not prove that the QST system fully removes confounding by anatomy.

External validity

Who it applies to

Patients with primary craniopharyngioma treated at high-volume skull base centers that can offer both transcranial and endonasal surgery.

Who it does not

Recurrent or previously irradiated tumors, or centers where only one approach is routinely available and optimized.

Generalizability notes

  • The findings are most useful for choosing approach by tumor growth pattern, not for declaring one approach globally superior.
  • Applicability is strongest in teams experienced with complex endoscopic skull base reconstruction.
  • Long follow-up strengthens recurrence comparisons relative to many smaller series.

Evidence trace

Source trace and metadata

Citations (4)

claim_id

methods_critique.confounding

locator

p. 2

claim_id

stats_check.effect_sizes

locator

p. 1

claim_id

stats_check.absolute_effects

locator

p. 7 Table 3

claim_id

practice_impact.bottom_line

locator

p. 1

Metadata

Generated at

2026-03-08T16:15:00-05:00

Version

manual-pdf-repair-v1