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A lung nodule or pulmonary nodule is a relatively small focal density in the lung. A solitary pulmonary nodule (SPN) or coin lesion, [1] is a mass in the lung smaller than three centimeters in diameter. A pulmonary micronodule has a diameter of less than three millimetres. [2] There may also be multiple nodules. One or more lung nodules can be ...
This finding is most commonly associated with hematogenous metastases, where malignant cells spread to the lungs via the bloodstream, forming discrete nodules that resemble cannonballs. [2] The term "cannonball" reflects the large, rounded appearance of these lesions, often evident on chest radiographs or CT scans.
The most frequent findings on a computed tomography (CT) of the chest are multiple primary nodules and/or masses, on a background of mosaic attenuation and airway wall thickening. [2] [9] The nodules have an indolent pattern of growth and are found throughout the lungs. The nodules are typically rounded and well-defined.
Pulmonary carcinoid tumor; Pleuropulmonary blastoma; Neuroendocrine tumors of the lung [7] Lymphomas of the lung. [8] Sarcomas of the lung. [9] Some rare vascular tumors of the lung [8] Non-lung tumors which may grow into the lungs: Mediastinal tumors; Pleural tumors; Metastasis or secondary tumors/neoplasms with other origin: Metastasis to the ...
Breast cancer, lung cancer and colon cancer are solid cancer tumors known as carcinomas, which are the most common type, making up anywhere from 80% to 90% of cancer diagnoses, according to the ...
Adenocarcinoma in situ (AIS) of the lung —previously included in the category of "bronchioloalveolar carcinoma" (BAC)—is a subtype of lung adenocarcinoma.It tends to arise in the distal bronchioles or alveoli and is defined by a non-invasive growth pattern.
In lung cancer screening studies as many as 30% of those screened have a lung nodule, the majority of which turn out to be benign. [15] Besides lung cancer many other diseases can also give this appearance, including hamartomas , and infectious granulomas caused by tuberculosis , histoplasmosis , or coccidioidomycosis .
The nodules in the lung typically occur bilaterally and peripherally, on a background of simple coal workers' pneumoconiosis. There are usually multiple nodules, varying in size from 0.5 to 5.0 cm. The nodules typically appear rapidly, often in only a few weeks. Nodules may grow, remain unchanged in size, resolve, or disappear and then reappear.
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