Deep cervical lymphaticovenous anastomosis for Alzheimer's disease: theoretical foundations, regulatory suspension, and translational challenges.

Alzheimer's disease (AD) is a neurodegenerative disorder characterized by pathological changes in β-amyloid protein deposition, abnormal tau protein phosphorylation neurofibrillary tangles, and chronic neuroinflammation. Recent studies have shown that the glymphatic-meningeal-cervical lymphatic system pathway plays a crucial role in the clearance of intracranial metabolic waste. Dysfunction of this system may lead to a decrease in the clearance efficiency of Aβ and tau proteins. Deep cervical lymphaticovenous anastomosis (DCLVA) has been proposed as a novel surgical approach to enhance cervical lymphatic drainage, reduce Aβ/tau accumulation, and improve cognitive function in patients with AD. However, on 8 July 2025, the National Health Commission of China issued a notice prohibiting the clinical application of "deep cervical lymphaticovenous anastomosis" for the treatment of AD. This article provides a narrative review with critical appraisal of the theoretical basis, surgical mechanisms, and clinical evidence of DCLVA for AD. We objectively evaluate the strengths and limitations of current clinical studies, critically appraise the uncertainty of underlying physiology, and comprehensively analyze the potential risks, safety concerns, and translational obstacles that led to regulatory suspension. We further clarify unresolved scientific questions including pressure gradients, lymphatic contractility, reflux risk, anastomotic patency, and biomarker validation. By framing DCLVA within the context of its clinical prohibition, we provide clinicians and researchers with a balanced appraisal that acknowledges both the procedure's potential and the substantial gaps that must be addressed before widespread application can be justified.