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Light's Criteria for Pleural Effusions

#Diagnosis #Pulmonary #Lights #Criteria #Pleural #Effusion #Differential

** GrepMed Recommended Text: Pocket Medicine:
Criteria for Pleural Effusions ... Criteria #Pleural #Effusion
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
perilymphatic, random ... pattern is either random ... it is likely a random ... Differential #Algorithm #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
adenopathy and pleural effusion ... Comparison #Table #RadiologyAssistant
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
, climbing the Andes ... syndrome, OSA DIFFUSION ... of reversible diffusion ... gradients of both perfusion ... with adequate perfusion
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Miliary TB: random ... Comparison #Table #RadiologyAssistant
On the left another patient with a large cardiac silhouette on the chest x-ray due to
to pericardial effusion ... Pericardial effusion ... #Pericardial #Effusion ... PericardialEffusion #RadiologyAssistant
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Causes of Knee Effusions ... Framework Knee Effusion ... Infectious Knee Effusions ... Traumatic Knee Effusions ... Malignant Knee Effusions
The distribution of nodules shown on HRCT is the most important factor in making an accurate
centrilobular or random ... Random refers to ... Random distribution ... #Distribution #Random ... Comparison #Diagram #RadiologyAssistant
Antibiotics and CNS Diffusion

1. Drugs with good CNS diffusion:

- Fluoroquinolones, Fluconazole, voriconazole, Rifampin, Oxazolidinones, Metronidazole

2. Drugs
Antibiotics and CNS Diffusion ... Antibiotics #CNS #Diffusion ... #BloodBrain #Perfusion
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
- Metastases: random ... Comparison #Table #RadiologyAssistant