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On the left another typical case of sarcoidosis.
In addition to the perilymphatic nodules, there are multiple
perilymphatic nodules ... enlarged lymph nodes ... located in the upper lobes ... Clinical #Radiology #CTChest
#Clinical #Radiology #CXR #CTChest #Longstanding #Sarcoidosis #Fibrosis #Conglomerate #Nodules #RadiologyAssistant
Radiology #CXR #CTChest ... #Conglomerate #Nodules
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
centrilobular nodules ... . - If pleural nodules ... and also nodules ... #Diagnosis #Radiology ... Pulmonary #HRCT #CTChest
Acute Rheumatic Fever: Pathogenesis and Clinical Findings

Delayed autoimmune reaction
-> Molecular mimicry
-> GAS antigen cross-reacts with host
->
• Subcutaneous Nodules ... (Osler's Nodes) ... RheumaticFever #pathophysiology ... #diagnosis #signs
Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
Anatomy Annotated on Chest ... lang=us #Lung #lobes ... #Segments #Chest ... #CT #CTChest #pulmonary
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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
centrilobular nodules ... Sarcoidosis: nodules ... Sarcoidosis: nodules ... #Clinical #Diagnosis ... Radiology #Pulmonary #CTChest
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Perilymphatic nodules ... in differential diagnosis ... perilymphatic nodules ... #Diagnosis #Radiology ... Pulmonary #HRCT #CTChest
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
centrilobular nodules ... Miliary TB: random nodules ... Sarcoidosis: nodules ... centrilobular nodules ... Radiology #HRCT #CTChest
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
multiple ill-defined nodules ... lesions than the chest ... can suggest the diagnosis ... the ill-defined nodules ... Radiology #CXR #CTChest
Solid pulmonary nodules can represent various etiologies:
- benign granulomas
- focal scar
- intrapulmonary lymph nodes
- primary malignancies
-
Solid pulmonary nodules ... intrapulmonary lymph nodes ... Perifissural nodules ... intrapulmonary lymph nodes ... #Diagnosis #Radiology