CTA-defined calcified nodules as a predictor of adverse outcomes following carotid revascularization

Q: What are the key findings of this study?

Bulky calcification abutting the lumen on CTA was strongly associated with procedural failure, ischemic complications, or restenosis after carotid revascularization (55.6% vs 4.8%; OR 24.69, p<0.001).

Q: What is the clinical evidence from this study?

Study design: Cohort. Population: Atherosclerotic carotid artery stenosis undergoing carotid revascularization (CEA or CAS) (n=92). Intervention: Bulky carotid calcification directly abutting the contrast-enhanced vascular lumen on preoperative CTA (Group 3) vs. No/spotty calcification (Group 1) or outer calcification not directly abutting the lumen (Group 2). Primary outcome: Composite of procedural failure (inability to complete CEA or CAS), symptomatic ischemic complications within 30 days, or restenosis (>=70% on postoperative MRI or ultrasonography) (OR 24.69, 95% CI 4.72-129.14, p=<0.001).

Q: What does this research mean for the field?

Preoperative CTA-defined bulky calcification directly abutting the vascular lumen is strongly associated with adverse outcomes, particularly procedural failure and restenosis following carotid artery stenting. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Q: What question did this study set out to answer?

To determine whether preoperative computed tomography angiography (CTA) calcification morphology predicts adverse clinical outcomes following carotid endarterectomy (CEA) or carotid artery stenting (CAS).

Hiroki Uchida; Ryosuke Tashiro; Atsushi Kanoke; Hiroyuki Sakata; Hidenori Endo

doi:10.1007/s10143-026-04565-7

November 10, 2026Neurosurgical ReviewOpen Access

CTA-defined calcified nodules as a predictor of adverse outcomes following carotid revascularization

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Key result

Bulky luminal carotid calcification linked to ~24.7-fold higher odds of procedural failure or complications.

OR 24.69
95% CI 4.72-129.14
P<0.001
n=92

Why the study?

Carotid calcification can complicate carotid artery stenting, and its clinical impact following carotid revascularization may depend on calcification morphology rather than calcification burden alone.

Does preoperative CTA-defined bulky calcification directly abutting the vascular lumen predict procedural failure, ischemic complications, or restenosis in patients undergoing carotid revascularization with CEA or CAS?

Key Points

To determine whether preoperative computed tomography angiography (CTA) calcification morphology predicts adverse clinical outcomes following carotid endarterectomy (CEA) or carotid artery stenting (CAS).
Retrospective study of 92 patients undergoing carotid revascularization with either CEA (n=49) or CAS (n=43).
Preoperative CTA classified lesions into Group 1 (no/spotty calcification), Group 2 (outer calcification), and Group 3 (bulky calcification directly abutting the contrast-enhanced lumen).
The primary composite endpoint comprised procedural failure, ischemic complications, or restenosis.
The primary composite endpoint occurred in four of 83 patients (4.8%) in Groups 1/2 versus five of nine patients (55.6%) in Group 3 (unadjusted OR, 24.69; 95% CI, 4.72–129.14; p < 0.001).
In a multivariable model, Group 3 calcification remained independently associated with the composite endpoint (adjusted OR, 49.05; 95% CI, 4.82–498.94; p = 0.001), whereas CEA showed lower odds (adjusted OR, 0.045; 95% CI, 0.003–0.664; p = 0.024).
Among patients treated with CAS, the composite endpoint occurred in three of 38 patients (7.9%) in Groups 1/2 and all five patients (100%) in Group 3 (p < 0.001).

Study Design

Type

Cohort (n=92)

Multicenter

No

Structured PICO

Does preoperative CTA-defined bulky calcification directly abutting the vascular lumen predict procedural failure, ischemic complications, or restenosis in patients undergoing carotid revascularization with CEA or CAS?

P

Population

92 patients (mean age 73 years, 9.8% female) undergoing elective carotid revascularization (49 CEA, 43 CAS) for atherosclerotic carotid stenosis in Japan, followed for a mean of 24 months.

E

Exposure

Carotid revascularization via carotid endarterectomy (CEA, n=49) or carotid artery stenting (CAS, n=43) in patients with preoperative contrast-enhanced CTA-defined Group 3 bulky calcification (nodular or mass-like calcification directly abutting the contrast-enhanced vascular lumen, n=9).

C

Comparator

Carotid revascularization via CEA or CAS in patients with preoperative CTA-defined Group 1 (no/spotty calcification, n=40) or Group 2 (outer/peripheral calcification not directly abutting the contrast-enhanced lumen, n=43) calcification patterns.

O

Outcome

Composite endpoint of procedural failure (inability to complete CEA or CAS), ischemic complications (symptomatic ischemic events within 30 days post-procedure), or restenosis (recurrent stenosis ≥70% on postoperative MRI or ultrasonography) over a mean follow-up of 24 months (range, 10–38 months).composite

Main Result

Odds Ratio: 24.69 (95% CI 4.72–129.14)

Absolute Event Rate: 55.6% vs 4.8%

p-value: p=<0.001

Preoperative CTA-defined bulky calcification directly abutting the carotid lumen strongly predicts technical failure and restenosis following carotid artery stenting (100% event rate in this subgroup), supporting the selection of carotid endarterectomy when surgically feasible.

Limitations

Single-center retrospective study with a limited sample size (n=92, only 9 patients in Group 3 and 9 total composite endpoint events) and wide confidence intervals
Non-randomized treatment allocation based on operator judgment, leading to potential selection bias and confounding by indication
Study-specific CTA classification without established inter-observer reproducibility
Lack of pathological confirmation of calcified nodules in all Group 3 lesions
Composite endpoint combined events with different mechanisms and time horizons, and restenosis ascertainment may have been influenced by variable follow-up duration
Single-center retrospective study with a limited sample size (only nine patients in Group 3 and nine total composite endpoint events), resulting in wide confidence intervals and substantial statistical uncertainty.
Non-randomized treatment allocation based on operator judgment, patient characteristics, vascular anatomy, and plaque morphology, introducing potential selection bias and confounding by indication.
Study-specific CTA classification without established inter-observer reproducibility.
Lack of pathological confirmation of calcified nodules (CN) in all Group 3 patients.
Composite endpoint combined events with different mechanisms and time horizons, and ascertainment of restenosis may have been influenced by differences in follow-up duration.

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Implication

Bulky luminal calcification on CTA was associated with adverse revascularization outcomes; leaves open whether morphology should guide CEA versus CAS selection.

Abstract

Carotid calcification can complicate carotid artery stenting (CAS), but its clinical impact may depend on calcification morphology rather than calcification burden alone. We retrospectively evaluated 92 patients who underwent carotid revascularization with either carotid endarterectomy (CEA) or CAS and classified preoperative computed tomography angiography (CTA) findings as no/spotty calcification (Group 1), outer calcification (Group 2), or bulky calcification directly abutting the contrast-enhanced lumen (Group 3). The primary composite endpoint comprised procedural failure, ischemic complications, or restenosis. The endpoint occurred in four of 83 patients (4.8%) in Groups 1/2 and five of nine patients (55.6%) in Group 3 (unadjusted odds ratio [OR], 24.69; 95% confidence interval [CI], 4.72–129.14; p < 0.001). In a parsimonious multivariable model including treatment modality and calcification pattern, Group 3 remained associated with the composite endpoint (adjusted OR, 49.05; 95% CI, 4.82–498.94; p = 0.001), whereas CEA was associated with lower odds of reaching the endpoint (adjusted OR, 0.045; 95% CI, 0.003–0.664; p = 0.024). Among patients who underwent CAS, the endpoint occurred in three of 38 patients (7.9%) in Groups 1/2 and all five patients (100%) in Group 3 (p < 0.001). CTA-defined bulky calcification may identify lesions at particularly high risk for CAS-related technical failure or restenosis and may support consideration of CEA when surgically feasible.

Discussion

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Cite This Study

Uchida et al. (2026) conducted a cohort in Atherosclerotic carotid artery stenosis undergoing carotid revascularization (CEA or CAS) (n=92). Bulky carotid calcification directly abutting the contrast-enhanced vascular lumen on preoperative CTA (Group 3) vs. No/spotty calcification (Group 1) or outer calcification not directly abutting the lumen (Group 2) was evaluated on Composite of procedural failure (inability to complete CEA or CAS), symptomatic ischemic complications within 30 days, or restenosis (>=70% on postoperative MRI or ultrasonography) (OR 24.69, 95% CI 4.72-129.14, p=<0.001). Bulky calcification abutting the lumen on CTA was strongly associated with procedural failure, ischemic complications, or restenosis after carotid revascularization (55.6% vs 4.8%; OR 24.69, p<0.001).

synapsesocial.com/papers/6af3b1a5cf860dd505ec131b https://doi.org/10.1007/s10143-026-04565-7

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CTA-defined calcified nodules as a predictor of adverse outcomes following carotid revascularization

Key Points

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

CTA-defined calcified nodules as a predictor of adverse outcomes following carotid revascularization

Key Points

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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