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Subsolid nodules
Most subsolid nodules are transient and the result of infection or hemorrhage.
However, persistent subsolid nodules
Subsolid nodules ... Most subsolid nodules ... #Diagnosis #Radiology ... #Pulmonary #Fleischner ... PulmonaryNodule #Followup #RadiologyAssistant
Solid pulmonary nodules can represent various etiologies:
- benign granulomas
- focal scar
- intrapulmonary lymph nodes
- primary malignancies
-
Solid pulmonary nodules ... Perifissural nodules ... #Diagnosis #Radiology ... #Pulmonary #Fleischner ... PulmonaryNodule #Followup #RadiologyAssistant
Since these risk factors are numerous and have different effects on the malignancy risk, it is
malignancy [8](Table ... #Diagnosis #EBM ... Radiology #Pulmonary #Fleischner ... PulmonaryNodule #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
diseases with a nodular ... centrilobular nodules ... #Clinical #Diagnosis ... Differential #Comparison #Table ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... Nodular LCH: - Sarcoidosis ... LIP #Clinical #Diagnosis ... Differential #Comparison #Table ... #RadiologyAssistant
Risk factors
Defining high- or low-risk is currently more difficult than it was in the old guideline.
Previously
characteristics alone (See Table ... #Diagnosis #Epidemiology ... Radiology #Pulmonary #Fleischner ... PulmonaryNodule #Nodule ... #RadiologyAssistant
Fleischner Society recommendations for follow-up of nodules
Previous chest radiographs should be reviewed to determine if the
Fleischner Society ... for follow-up of nodules ... lesion has been stable ... definitive tissue diagnosis ... #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... patterns: reticular, nodular ... low attenuation (table ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
limited differential diagnosis ... (Table). ... Nodular or irregular ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant