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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
or air-filled lesions ... #Diagnosis #Radiology ... #Pulmonary #CTChest
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
in differential diagnosis ... nodules and the nodular ... #Diagnosis #Radiology ... Pulmonary #HRCT #CTChest ... Perilymphatic #Nodular
Coarctation of Aorta (CoA) & Interrupted Aortic Arch (IAA)
 • Prevalence
 • Anatomy of CoA
 •
• Associated Lesions ... • Associated Lesions ... Aortic #Arch #IAA #cardiology ... pediatrics #peds #diagnosis ... #management
d-Transposition of the Great Arteries
 • Anatomy
 • Epidemiology
 • Associated Lesions
 • Pathophysiology/Presentation
 • Classic
• Associated Lesions ... Presentation • Classic Chest ... Pre-operative management ... peds #pediatrics #cardiology ... #diagnosis #management
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
demonstrates more lesions ... can suggest the diagnosis ... wegde-shaped peripheral lesions ... #Clinical #Radiology ... #CXR #CTChest #
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 ... #Radiology #CTChest
Behçet's Syndrome
Systemic disease associated with inflammation of multiple organs, small-vessel vasculitis and large-vessel vasculopathy
Epidemiology:
 • Young
ulceration • Ocular ... artery aneurysms Diagnosis ... ) Differential Diagnosis ... Leukemia, Lymphoma Ocular ... #management #signs
Cor triatriatum
 • Epidemiology
 • Etiology
 • Associated Lesions
 • Differentials Diagnosis
 • Anatomy - Sinister,
• Associated Lesions ... Differentials Diagnosis ... Presentation • Diagnosis ... Post-Operative Management ... #management #cardiology
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
the differential diagnosis ... irregular and often nodular ... #Diagnosis #Pathophys ... #Radiology #Pulmonary ... #CTChest #TreeInBud
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
diseases with a nodular ... histiocytosis: early nodular ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #CTChest #Nodular