12 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
Chronic hypersensitivity ... The HRCT shows a ... hyperaerated secondary nodules ... and secondry nodules ... Clinical #Radiology #CXR
Approach to the diagnosis of chronic hypersensitivity pneumonitis. 
*Consider additional test: bronchoscopy with bronchoalveolar lavage, transbronchial
Approach to the diagnosis ... of chronic hypersensitivity ... pneumonitis; HRCT ... pneumonitis #pulmonary #diagnosis ... #algorithm #HP
Erythrocytosis - Polycythemia Differential Diagnosis Algorithm

Elevated Hemoglobin:
 • Males: Hb > 16.5 g/dL/HCT ≥ 49%
 •
Differential Diagnosis ... Algorithm Elevated ... Hb > 16.5 g/dL/HCT ... : Hb > 16 g/dL/HCT ... #Algorithm #hematology
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... on HRCT Most of ... disease comes from HRCT ... On HRCT there are ... patterns: reticular, nodular
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... pattern The algorithm ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #Algorithm
Polycythemia - Differential Diagnosis Algorithm
Polycythemia itself isn’t a diagnosis. Like many things, it is a condition
Diagnosis Algorithm ... isn’t a diagnosis ... Hb>16.5 g/dL, Hct ... Hb>16.0 g/dL, Hct ... #Algorithm #workup
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
The differential diagnosis ... Hypersensitivity ... centrilobular nodules ... density (acinar nodules ... are confluent, HRCT
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
- Imaging: • CXR ... irregular lines, nodular ... , cavities • HRCT ... interstitial pneumonia’s, Hypersensitivity ... pulmonary #ILD #diagnosis
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
tracheobronchomegaly) • Hypersensitivity ... plethora with polycythemia ... centrilobular nodules ... parenchyma Diagnosis ... : • HRCT (high-resolution
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
interpretation of HRCT ... HR-pattern: reticular nodular ... bronchiectasis) #Diagnosis ... Radiology #Pulmonary #HRCT ... Interpretation #Algorithm