Seroma Formation after Parotidectomy: Incidence, Risk Factors, and Clinical Implication

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Abstract
ABSTRACT Background: Postoperative seroma is an underrecognized but clinically relevant complication after parotidectomy, leading to repeated aspirations and patient discomfort. Limited evidence exists on its incidence, risk factors, and clinical course. Methods: We retrospectively reviewed 527 patients who underwent parotidectomy between 2020 and 2025. Demographics, tumor characteristics, surgical details, and postoperative variables were analyzed. Seroma was defined as fluid accumulation requiring aspiration without evidence of salivary fistula. Persistent seroma was defined as requiring multiple aspirations or persisting beyond 14 days after drain removal. Multivariate logistic regression was performed to identify independent predictors, and subgroup analyses were conducted for persistent seroma. Results: Seroma occurred in 10.6% of patients. Independent risk factors included anterior tumor location (OR 2.21), larger tumor size (OR 1.58 per cm), body mass index ≥25 (OR 1.76), and use of facelift-type incisions (OR 1.92). Among patients with seroma, 33.9% developed persistent seroma, which was associated with larger tumors, higher BMI, greater aspirated volumes, and longer resolution times. Higher drain output prior to removal was also observed in the seroma group, suggesting that current thresholds for drain removal may be insufficient in high-risk patients. Conclusion: Anterior tumor location, larger tumor size, elevated body mass index, and facelift-type 3 incisions are significant predictors of postoperative seroma after parotidectomy. Risk-adapted strategies, such as individualized drain removal protocols and early use of compression dressings, may reduce seroma-related morbidity.
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Authors KIM, JOO HYUN
Journal Frontiers in surgery
Year Year not found
DOI
10.3389/fsurg.2025.1704742
URL
https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2025.1704742/full
Keywords Keywords not found

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