Differentials Flashcards
Name the 3 step structured approach when interpreting a CT Chest
1) What is the dominant patter?
2) Where is the dominant pattern located in the secondary lobule?
3) Which lung zones are affected?
Name the 4 possible dominant patterns that can present on CT Chest
1) Reticular pattern
2) Nodular pattern
3) High attenuation pattern (GGO, consolidation)
4) Low attenuation pattern (emphysema, cystic)
Name the locations a dominant pattern can affect in the secondary lobule
1) Centrilobular
2) Perilymphatic
3) Random (both)
What are the 4 lung zones?
1) Cephalic
2) Caudal
3) Central
4) peripheral
Name a general differential of diseases that primarily affect the upper lungs (Cephalic distribution)
Name a general differential of diseases that primarily affect the lower lungs (Caudal distribution)
Name a general differential of diseases that can be seen in a central distribution
What are the two types of reticular patterns?
1) Septal thickening
2) Honeycombing
What is the differential for septal thickening without architectural distortion?
What is the differential for septal thickening with honeycombing in peripheral and lower zone distribution
What is the differential for septal thickening with architectural distortion where honeycombing is absent or minimal?
What is the size of a nodule?
Less than 3cm
What is the differential for perilymphatic nodules?
Note: pneumoconioses include silicosis and berylliosis
What is the differential for random nodules?
Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH)
What is the differential for tree in bud nodules (centrilobular)?
What is the differential for poorly defined centrilobular nodules?
