What is a noncalcified lung nodule?


A non-calcified lung nodule is one that does not show a pattern of calcification. According to Radiology Rounds, a newsletter issued by the Massachusetts General Hospital Department of Radiology, a lung nodule is a round lesion with a diameter of less than 3 centimeters with normal lung parenchyma surrounding it.

Calcification patterns generally indicate that a lung nodule is a benign hamartoma or granuloma. Radiology Rounds states that over 99 percent of non-calcified nodules under 4 millimeters in diameter are benign. Larger lung nodules, between 4 and 8 millimeters in diameter, pose a higher risk of malignancy, but around 94 percent of such nodules in patients without histories of cancer are benign. Fifty percent of the largest nodules, those over 8 millimeters, are malignant. In such cases, a biopsy or other evaluation method is recommended.

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In most cases, lung nodules are benign and require only observation using X-rays to check if the growth gets larger or changes over time, reports the U.S. National Library of Medicine
dermoid cyst, pilomatrixoma.
Causes of noncancerous lung nodules include histoplasmosis, tuberculosis, lung cysts
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