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Pre-proof, online 8 December 2025
Chylous Fistula During Anterior Cervical Microdiscectomy: Case Report and Literature Review
Fístula quilosa durante microdiscectomía cervical anterior: presemtación de caso clínico y revisión de la literatura
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Pelayo Hevia-Rodríguez
Corresponding author
pelahevia@gmail.com

Corresponding author:
, Laura Panés Laglera, Irati de Goñi García, Fernando Iturbe-Sarmiento, Nicolás Samprón
Department of Neurosurgery, Hospital Universitario Donostia, Donostia, Gipuzkoa, Spain
Highlights

  • Chyle leak following an anterior cervical approach is an extremely rare complication which must nonetheless be considered.

  • Postoperative diagnosis is usually based on soft swelling at the surgical wound with whitish drainage.

  • Due to its anatomical distribution, the risk is higher in left-sided approaches near C5-C6 and in low right-sided approaches near T1.

  • If detected intraoperatively and feasible, an attempt should be made to suture the duct.

  • In cases of low-output leak (<500 ml/day), conservative management with a low-fat diet may be sufficient.

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RESUMEN

El abordaje anterior a la columna cervical es una técnica ampliamente utilizada en cirugía de columna. Aunque sus complicaciones más frecuentes afectan a estructuras vasculares, nerviosas o digestivas, también existe la posibilidad de lesionar vasos del sistema linfático, pudiendo causar complicaciones graves si no se diagnostican y tratan de forma precoz. Presentamos el caso de una mujer de 70 años, con antecedentes de artrodesis lumbar y prótesis C5-C6, intervenida mediante microdiscectomía anterior C7-T1 por abordaje derecho. Durante la disección, se identificó la fuga de líquido blanquecino denso compatible con quilo, tras la lesión de un vaso linfático. Se realizó ligadura con sutura y se colocó un drenaje prevertebral. Durante el postoperatorio desarrolló un hematoma leve en la zona acromioclavicular, sin colecciones cervicales. El drenaje fue retirado tras cuatro días de dieta absoluta, iniciándose dieta baja en grasas. La paciente fue dada de alta sin complicaciones. Tras cinco años de seguimiento no ha desarrollado ninguna complicación asociada. La fístula de quilo tras discectomía cervical anterior es una complicación infrecuente (0,02 %), debe sospecharse ante la presencia de líquido lechoso en la herida o el drenaje y/o acúmulo progresivo. Su diagnóstico precoz y el tratamiento adecuado son claves para evitar complicaciones mayores. El riesgo es mayor en abordajes izquierdos cercanos a C6 y derechos bajos (C7-T1), especialmente en presencia de variantes anatómicas.

Palabras clave:
Fístula quilosa
Abordaje cervical anterior
Conducto torácico
Complicación quirúrgica
Discectomía cervical anterior
Abstract

The anterior approach to the cervical spine is a widely used technique in spinal surgery. Although its most common complications involve vascular, neural, or digestive structures, there is also the potential for injury to lymphatic vessels, which can lead to serious complications if not promptly diagnosed and treated. We present the case of a 70-year-old woman with a history of lumbar arthrodesis and a C5-C6 cervical prosthesis, who underwent an anterior microdiscectomy at C7-T1 via a right-sided approach. During dissection, a dense whitish fluid compatible with chyle was observed, indicating injury to a lymphatic vessel. Ligation with suture was performed and a prevertebral drain was placed. In the postoperative period, the patient developed a mild hematoma in the acromioclavicular region, without cervical collections. The drain was removed after four days of total fasting, followed by the introduction of a low-fat diet. The patient was discharged without complications. After five years of follow-up, no associated complications have been observed. Chyle fistula following anterior cervical discectomy is a rare complication (0.02%) and should be suspected in the presence of milky fluid in the surgical wound, drainage, and/or progressive accumulation. Early diagnosis and appropriate treatment are essential to prevent more severe outcomes. The risk is higher in left-sided approaches near C6 and low right-sided approaches (C7-T1), particularly in the presence of anatomical variants

Keywords:
Chylous fistula
Anterior cervical approach
Thoracic duct
Surgical complication
Anterior cervical discectomy
nterior cervical discectomy

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