MRI morphometric features of neck abscesses provide added prognostic value beyond diameter

MRI segmentation-derived abscess volume improved prediction of ICU admission (AUC 0.841 [95%CI 0.78-0.90] vs. 0.816 for diameter), and lower sphericity independently predicted prolonged stay.

• Sphericity was lower in ICU patients (median 0.35 vs 0.45, p=6.6×10⁻⁵) and patients with prolonged stay (p=9.1×10⁻⁶).
• Adding sphericity improved the model for prolonged hospital stay (R² 0.246 vs 0.216, p=0.005).
• The study did not assess how these features would guide individual treatment decisions, warranting prospective validation.

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