43 results
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Hypersensitivity ... Hypersensitivity ... #Clinical #Radiology ... Comparison #Table #RadiologyAssistant
Milk Hypersensitivity Allergy

This 6-month-old breast-fed infant developed an allergic reaction (a), with widespread urticaria immediately after
Milk Hypersensitivity ... Allergy This ... Skin-prick test ... (c) #Milk #Hypersensitivity ... #Allergy #Clinical
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
diseases with a nodular ... Hypersensitivity ... Hypersensitivity ... #Clinical #Diagnosis ... Comparison #Table #RadiologyAssistant
Type IV Hypersensitivity: Pathogenesis and clinical findings
Definition: Unique because it is entirely T-Cell mediated; exposure to
Type IV Hypersensitivity ... Pathogenesis and clinical ... causes development ... of allergen-specific ... Allergic reaction
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
Chronic hypersensitivity ... hyperaerated secondary nodules ... and secondry nodules ... #Clinical #Radiology ... Chronic #Fibrosis #RadiologyAssistant
Ill defined centrilobular nodules of ground glass density in a patient with hypersensitivity pneumonitis #Clinical #Radiology
centrilobular nodules ... a patient with hypersensitivity ... pneumonitis #Clinical ... Radiology #CTChest #Hypersenstitivity ... Centrilobular #RadiologyAssistant
Mucoid impaction
Mucus plugs or mucoid impaction can mimick the appearance of lung nodules or a mass.
Sometimes
appearance of lung nodules ... fibrosis (CF) and allergic ... ABPA is a hypersensitivity ... bronchial obstruction caused ... #Clinical #Radiology
Type III Hypersensitivity: Pathogenesis and clinical findings
Definition: Small antigen-antibody complexes (produced from normal immune response to
Type III Hypersensitivity ... Pathogenesis and clinical ... self-antigens are the cause ... antigens are the cause ... HypersensitivityReaction #Allergy
Here are the most common examples of these four patterns on a chest x-ray (click image
opacities - Fine Nodular ... Solitary Pulmonary Nodule ... - Multiple Masses ... Atelectasis #Diagnosis #Clinical ... Consolidation #Patterns #RadiologyAssistant
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
table of types of hypersensitivity ... Mechanism of Action: Allergen-specific ... lgE causes mast-cell ... dermatitis, Tuberculin test ... reactions #types #allergy