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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
diseases with a nodular ... centrilobular nodules ... Sarcoidosis: nodules ... centrilobular nodules ... Sarcoidosis: nodules
The distribution of nodules shown on HRCT is the most important factor in making an accurate
distribution of nodules ... in the nodular ... most cases small nodules ... distribution, nodules ... centrilobular nodules
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
centrilobular nodules ... the differential diagnosis ... irregular and often nodular ... identified in the lung ... TreeInBud #Diagram #RadiologyAssistant
Cheerio Sign (Open Bronchus Sign) on Chest CT
 • Pulmonary nodule with a central lucency
 •
CT • Pulmonary nodule ... and metastatic lung ... malignancy, rheumatoid nodules ... #CT #Lung #Pulmonary ... #diagnosis #radiology
Whenever you see an area of increased density within the lung, it must be the result
density within the lung ... opacities or small nodules ... . 3- Nodule or mass ... #Diagnosis #Radiology ... Consolidation #Patterns #RadiologyAssistant
Dermatofibroma 
 - Skin-colored to brown papule or nodule 
 - Firm, indurated texture 
 -
brown papule or nodule ... Male - Dimple sign ... Dermatofibroma #Dermatology ... #Diagnosis #Benign
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
multiple ill-defined nodules ... can suggest the diagnosis ... the ill-defined nodules ... feeding vessel sign ... SepticEmboli #Cavity #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... Nodular LCH: - Sarcoidosis ... : 'signet ring sign ... #Differential #Comparison ... #Table #RadiologyAssistant
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Feeding Vessel Sign ... leading into a lung ... nodule or mass ... Feeding #Vessel #Sign ... #diagnosis #radiology
Solitary Pulmonary Nodule
Click here for more detailed information about Solitary Pulmonary Nodule
A solitary pulmonary nodule or
Solitary Pulmonary Nodule ... Solitary Pulmonary Nodule ... solitary pulmonary nodule ... surrounded by lung ... #Differential #RadiologyAssistant