30 results
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
organizing pneumonia (COP ... COP. ... #Clinical #Radiology ... #HRCT #CTChest ... Pattern #Comparison #Table
Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
and cardiogenic pulmonary ... organizing pneumonia (COP ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #Table
Mosaic Attenuation on Chest CT
 • Variable attenuation seen on a chest CT in a lobular
BO, CTEPH, PJP, CEP ... , HP, COP https ... Attenuation #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
Organizing Pneumonia (COP ... Organizing Pneumonia - Clinical ... , cavities • HRCT ... Anti-dsDNA, ANCA COP ... Organizing #Pneumonia #COP
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... #Clinical #Radiology ... #HRCT #CTChest ... #Nodular #Pattern ... #Comparison #Table
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
Nodular pattern( ... #Clinical #Radiology ... #HRCT #CTChest ... #Nodular #Pattern ... #Comparison #Table
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
Sign) on Chest ... consolidation • DDx: COP ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Low Attenuation Nodular ... Hypersensitivity Pneumonia, COP ... Sarcoidosis, NSIP, COP ... Honeycombing: Idiopathic Pulmonary ... #radiology
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
organizing pneumonia (COP ... pneumonia the HRCT ... will be other signs ... #Radiology #CTChest ... #COP #Cryptogenic
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
: 'signet ring sign ... central dot. - LIP #Clinical ... #Diagnosis #Radiology ... #CTChest #Cystic ... Differential #Comparison #Table