20 results
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
age - Cystic bronchiectasis ... : 'signet ring sign ... central dot. - LIP #Clinical ... #Diagnosis #Radiology ... #Comparison #Table
CT Lung Signs in Pulmonary Diseases - One Page Summary of Pulmonary Signs
 - Air Crescent
CT Lung Signs in ... Signs - Air Crescent ... sign - CT angiogram ... sign - Feeding ... #differential #radiology
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Feeding Vessel Sign ... on Chest CT • ... CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
attenuation or air-filled ... histiocytosis) - Bronchiectasis ... pattern can be readily ... #Pulmonary #CTChest ... Differential #Diagram #Comparison
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
and sometimes air ... A signet-ring sign ... bronchitis, COPD and cystic ... #Diagnosis #Radiology ... #Pulmonary #Bronchiectasis
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Common Causes: • Cystic ... no evidence of cystic ... Nasal polyps and signs ... thickening, presence of air-fluid ... high-resolution chest CT
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
CT demonstrates ... abutting the pleura, air-bronchograms ... vessel sign (7) ... vessel sign (8) ... #Clinical #Radiology
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
Notice the air-fluid ... There is a lung cyst ... small airways leading ... to pulmonary cyst ... #Clinical #Radiology
Signet Ring Sign on Chest CT
 • Prominently dilated airway compared to its accompanying pulm vessel.
Signet Ring Sign ... • DDx: Bronchiectasis ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Allergic Bronchopulmonary Aspergillosis (ABPA)
WHAT IS IT?
Hypersensitivity response to Aspergillus fumigatus in the airways
 • Primarily affects
underlying asthma or cystic ... inflammatory response leading ... WHAT ARE THE CLINICAL ... CAN YOU SEE ON CT ... Aspergillosis #ABPA #pulmonary