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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Lung cysts (LAM, LIP ... low attenuation pattern ... #Diagnosis #Radiology ... Differential #Diagram #Comparison
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... there are four patterns ... a CXR the most common ... in many cases UIP ... #Diagnosis #Radiology
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
have specific patterns ... realise, that these patterns ... findings of NSIP, UIP ... , OP and LIP have ... #Diagnosis #Radiology
On the left a patient with DIP.
The HRCT shows diffuse areas of ground-glass density in the
a patient with DIP ... shows diffuse areas ... and some mosaic pattern ... #CTChest #DIP # ... DesquamativeInterstitialPneumonia #ILD
Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized
interstitial pneumonia (AIP ... The histologic pattern ... There are areas ... and extensive areas ... AIP.
Autoimmune Hepatitis

Clinical Presentation
 - Highly variable clinical presentation, from subclinical disease to acute liver failure.
 -
arthralgias) are common ... hepatocellular pattern ... though cholestatic pattern ... , AIH diagnosis ... Necrosis) If mild
Common Dermatological Conditions - Distribution and Morphology
 • Acne vulgaris - Face, upper back, chest -
Erythema with greasy ... temples, upper lip ... - Sun-exposed areas ... especially lower lip ... Christmas tree pattern
Hemorrhagic Pericardial Effusions (Hemopericardium)- Differential Diagnosis Framework

IATROGENIC DISEASE
Secondary to invasive cardiac procedures

NONIATROGENIC
• Malignancy (e.g., metastatic spread:
- Differential Diagnosis ... : lung cancer, breast ... effusions are uncommon ... and other CTD TIP ... #cardiology
Imaging Features of Autoimmune Pancreatitis (AIP)
Parenchymal changes suggestive of AIP:
1) Diffuse (AIP I) or (multi-) focal
Pancreatitis (AIP ... suggestive of AIP ... multilobulated pattern ... visible MPD- and/or common ... #diagnosis #radiology
On the left a patient who is treated with cytotoxic drugs for a hematologic malignancy.
The radiographic
radiographic findings are areas ... patients with a UIP ... pattern or NSIP ... pattern seen in ... #Clinical #Radiology