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nodule - (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment) mineralogy - the branch of geology that studies minerals: their structure and properties and the ways of distinguishing them.
Hi, The nodular density represents an abnormal lump. It may represent a malignancy or not (usually infectious causes leave lumps as part of the scars when they heal). The utility of CT scan in differentiating whether a spiculated nodule represents malignancy is poor. About 21% of malignancies have smooth borders.