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Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
pneumonia and UIP ... #Diagnosis #Radiology ... #Pulmonary #HRCT
Approach to the diagnosis of chronic hypersensitivity pneumonitis. 
*Consider additional test: bronchoscopy with bronchoalveolar lavage, transbronchial
Consider additional test ... Consider additional test ... hypersensitivity pneumonitis; HRCT ... computed tomography; UIP
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
is seen in: - UIP ... edema #Diagnosis #Radiology ... #Pulmonary #HRCT
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
disease comes from HRCT ... On HRCT there are ... appreciate on a cest ... in many cases UIP ... #Diagnosis #Radiology
Thomas' Test for Hip Flexure Contracture

Thomas' Test assesses for hip flexure contracture.
One hip is maximally flexed
Thomas' Test for ... Thomas' Test ... Video via @open_michigan ... #Thomas #Test ... PhysicalExam #clinical #video
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Lung cysts (LAM, LIP ... on the basis of HRCT ... #Diagnosis #Radiology
Freiberg's Test for Piriformis Syndrome

Flex the hip to 90 degrees, internally rotate the hip.
Pain in the
Freiberg's Test ... Syndrome Flex the hip ... internally rotate the hip ... is a positive test ... lumbar #clinical #video
Piriformis Test (FAIR Test - Flexion, Adduction, and Internal Rotation)

Flex the hip to 90 degrees, then
Piriformis Test ... (FAIR Test - Flexion ... Rotation) Flex the hip ... internally rotate the hip ... lumbar #clinical #video
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
resolution of the HRCT ... predominance: UIP ... , NSIP, DIP. - Centrilobular ... bronchiolitis #Diagnosis #Radiology
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
morphologic findings on HRCT ... findings of NSIP, UIP ... , OP and LIP have ... #Diagnosis #Radiology