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One or more lung nodules can be an incidental finding found in up to 0.2% of chest X-rays [3] and around 1% of CT scans. [ 4 ] The nodule most commonly represents a benign tumor such as a granuloma or hamartoma , but in around 20% of cases it represents a malignant cancer , [ 4 ] especially in older adults and smokers .
In medical or research imaging, an incidental imaging finding (also called an incidentaloma) is an unanticipated finding which is not related to the original diagnostic inquiry. As with other types of incidental medical findings , they may represent a diagnostic, ethical, and philosophical dilemma because their significance is unclear.
A focal lung pneumatosis is an enclosed pocket of air or gas in the lung and includes blebs, bullae, pulmonary cysts, and lung cavities. Blebs and bullae can be classified by their wall thickness. [1] A bleb has a wall thickness of less than 1 mm. [2] By radiology definition, it is up to 1 cm in total size. [3]
Bronchoscopy is not usually useful as these lesions tend to lie in the perifery of the lung. Fine needle aspirates may be not be sufficient to make the diagnosis. [7] [8] Blood tests are normal. CT shows a solitary nodule with may have some calcium present. PET scans may be positive. [9] [10]
Other concerns include radiation exposure, the cost of testing alone, and the cost of follow-up tests and imaging. [8] False reassurance from false negative findings, over-diagnosis, short term anxiety or distress, and increased rate of incidental findings are other risks. [10]
Caplan syndrome is a nodular condition of the lung occurring in dust-exposed persons with either a history of rheumatoid arthritis (RA) or who subsequently develop RA within the following 5–10 years. [3] The nodules in the lung typically occur bilaterally and peripherally, on a background of simple coal workers' pneumoconiosis. There are ...
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