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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 ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #CTChest #Nodular ... Comparison #Table #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Perilymphatic nodules ... perilymphatic nodules ... and the nodular ... #Diagnosis #Radiology ... Perilymphatic #Nodular
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... centrilobular nodules ... #Diagnosis #Radiology ... Pulmonary #HRCT #CTChest ... Differential #Algorithm #RadiologyAssistant
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 ... irregular and often nodular ... identified in the lung ... #Radiology #Pulmonary ... #CTChest #TreeInBud
Here are the most common examples of these four patterns on a chest x-ray (click image
opacities - Fine Nodular ... interstitial opacities Nodule ... Solitary Pulmonary Nodule ... Masses Atelectasis #Diagnosis ... #Clinical #Radiology
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Vessel Sign on Chest ... CT • Distinct ... nodule or mass ... #Vessel #Sign #CT ... #diagnosis #radiology
Cheerio Sign (Open Bronchus Sign) on Chest CT
 • Pulmonary nodule with a central lucency
 •
CT • Pulmonary ... nodule with a central ... and metastatic lung ... malignancy, rheumatoid nodules ... #diagnosis #radiology
The distribution of nodules shown on HRCT is the most important factor in making an accurate
making an accurate diagnosis ... in the nodular ... structures of the lung ... #Diagnosis #Radiology ... Comparison #Diagram #RadiologyAssistant
Pulmonary Nodule
Evaluation is guided by nodule size & assessment of probability of malignancy. In addition is
Pulmonary Nodule ... yield of available diagnostic ... diameter are called lung ... 70% to 90% for a diagnosis ... of lung cancer.
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 ... #Clinical #Radiology ... SepticEmboli #Cavity #RadiologyAssistant