A stone-like or calcified formation within the ethmoid bone or its air cells, usually due to infection or chronic inflammation.
From ethmo- (ethmoid bone) + -lith (Greek lithos, stone). Medical term following standard pathology naming for calcified deposits in body structures.
An ethmolith is basically a 'stone' that grows in your ethmoid bone—these calcified masses usually form from years of chronic sinus inflammation and can be discovered accidentally on CT scans when people get imaging for other reasons.
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