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- Tree-in-bud pattern | Radiology Reference Article | Radiopaedia. org
Tree-in-bud pattern describes the CT appearance of multiple areas of centrilobular micronodules with a linear branching pattern, resembling a budding tree 11 Although initially described in patients with endobronchial tuberculosis, it is now recognized in a large number of conditions
- Centrilobular lung nodules - Radiopaedia. org
Centrilobular nodules can be observed in a wide variety of lung pathology In particular, pathologies involving the bronchioles and the arterioles (i e , bronchiolitis and vasculitis), as both are located centrally in the secondary pulmonary lobule
- Tree-in-bud sign and bronchiectasis - Radiopaedia. org
CT confims numerous centrilobular nodules with opacified distal bronchioles (tree-in-bud sign) and bronchiectasis These findings most likely represents pulmonary TB or MAC despite negative induced sputum specimens
- Tree-in-bud pattern | Radiology Case | Radiopaedia. org
Multiple centrilobular nodules, many with a tree in bud type configuration, with minor ground glass opacity are identified involving primarily the lateral aspect of the left lower lobe
- Pulmonary micronodule | Radiology Reference Article | Radiopaedia. org
Pulmonary micronodules have a wide range of causes, although the threshold measurement for defining a pulmonary nodule as "micro" varies between <3 mm and <6 mm
- Lung Imaging Reporting and Data System (Lung-RADS)
Other potentially benign infectious inflammatory findings such as new tree-in-bud nodules and a new ground-glass nodule less than 3 cm diameter do not require short term follow-up and can be classified using existing size criteria based on the most suspicious nodule 1
- Cavitating pulmonary tuberculosis - Radiopaedia. org
The tree-in-bud appearance, characterized by centrilobular nodules with branching opacities, represents impacted and inflamed bronchioles, a hallmark of active disease 3,4
- Pulmonary Mycobacterium avium complex infection
In upper lobe cavitary form, thin-walled cavities with overall volume loss and fibrosis are the dominant feature, often also with features of endobronchial spread with tree-in-bud opacities seen elsewhere
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