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Six patients with laryngoceles, two internal and four of the mixed type, were studied with CT. Uncomplicated laryngoceles appear on CT as air-filled structures lying in the paralaryngeal space (internal), lateral neck (external), or in both locations (mixed). Obstruction of the neck of the laryngocele by either tumor or chronic inflammation can result in a fluid-filled structure, producing on CT a well circumscribed mass of either near water or soft-tissue density, depending on its composition. CT proved useful in establishing the definitive diagnosis of a laryngocele and mapping its total extent for treatment planning.
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