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Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
Central distribution ... is seen in sarcoidosis ... is mainly seen ... HRCT #ChestCT #Differential ... Central #Peripheral #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... perilymphatic distribution ... cysts, evenly distribution ... Cystic #Cysts #Differential ... Comparison #Table #RadiologyAssistant
Batwing
A bilateral perihilar distribution of consolidation is also called a Batwing distribution.
The sparing of the periphery
bilateral perihilar distribution ... called a Batwing distribution ... reverse Batwing distribution ... #CXR #Batwing #Differential ... #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
zone preference is ... zone preference is ... HRCT #ChestCT #Differential ... #Table #Distribution ... #Upper #Lower #RadiologyAssistant
Cognitive bias cheat sheet - 
Because thinking is hard.

#Diagnosis #Metacognition #Cognitive #Biases #Types #Causes #Differential #MedEd
Cognitive bias cheat ... Because thinking is ... Types #Causes #Differential
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
in number, the distribution ... periplymphatic distribution ... likely a random distribution ... MultipleNodules #Nodules #Differential ... #Algorithm #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Perilymphatic distribution ... the overlap in differential ... reticulonodular is ... Perilymphatic #Nodular #Differential ... #RadiologyAssistant
Multiple masses
The differential diagnostic list of multiple masses is very long.
The most important diagnoses are listed
Multiple masses The differential ... multiple masses is ... Sometimes it is ... difficult to differentiate ... #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
The distribution ... shown on HRCT is ... Perilymphatic distribution ... Random distribution ... Comparison #Diagram #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
perilymphatic distribution ... perilymphatic distribution ... NodularPattern #Differential ... Comparison #Table #RadiologyAssistant