Abstract
To the Editor,
The study by Weng et al, 1 which reports encouraging early- and mid-term outcomes after endovascular treatment for symptomatic spontaneous isolated superior mesenteric artery dissection (SISMAD) is of great interest. Among 93 patients, the authors reported an 86.3% cumulative complete remodeling rate and no dissection-related mortality. 1 Their imaging-based classification and structured computed tomography angiography follow-up offer useful evidence for a condition still largely guided by observational data.
The study also raises an important question: how should anatomical remodeling be interpreted in relation to the initial indication for intervention? Current European guidance suggests that primary endovascular treatment is generally not indicated for uncomplicated symptomatic SISMAD and should be reserved for failure of medical management or suspected bowel ischemia. 2 In the cohort reported by Weng et al, 1 symptom relief was nearly universal; however, more detailed stratification by indication—failed conservative therapy, persistent severe pain, true-lumen compromise, or concern for bowel ischemia—would improve clinical interpretation. Such information would help distinguish the benefit of intervention in clearly complicated disease from favorable outcomes observed in a broader symptomatic population.
A second issue is the central role assigned to complete remodeling. Before accepting complete remodeling as a sufficient endpoint, it should be considered alongside prior evidence that many patients with SISMAD follow a benign course with conservative management.3-5 False-lumen disappearance is a clear and clinically appealing endpoint, and it was achieved in most patients, particularly after stent-assisted coiling.1,6-8 However, endovascular therapy may improve imaging findings without changing clinically important outcomes in all uncomplicated cases. Reporting pain trajectory, analgesic use, ischemia-related laboratory markers, antiplatelet regimen and adherence, branch patency, and recovery of oral intake alongside remodeling would make the conclusions more clinically actionable.
Finally, the apparent advantage of stent-assisted coiling may be best interpreted according to morphology and clinical phenotype. This approach may be especially helpful when a patent false lumen, sizable ulcer-like projection, or persistent false-lumen flow raises concern for delayed or incomplete remodeling; however, routine escalation based on imaging alone may add procedural complexity. Future prospective registries could link morphological subtype, symptom severity, inflammatory or ischemic markers, and treatment timing to both anatomical and patient-centered outcomes.
Overall, Weng et al provide a valuable contribution to the evolving management of SISMAD. Closer alignment of remodeling endpoints with treatment indications and clinically meaningful recovery would further clarify which patients are most likely to benefit from early endovascular repair.
