We present two cases of sinolith in the ethmoid sinus. The first was a 52-year-old woman who complained of nasal dyspnea, postnasal drip and dry cough. Computed tomography (CT) showed a smooth-margined oval stone embedded in the middle meatus and occupying the bulla ethmoidalis, which was destroyed. The second was a 71-year-old man who had had repeated polypectomies. An oval calcified mass was revealed on CT in the anterior ethmoid sinus adjacent to the left lamina papyracea. All pertinent literature were reviewed and only one further case of ethmoid sinolith was encountered. The etiology, radiological features, differential diagnosis and treatment are discussed.
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