1111 results
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
invasive pulm aspergillosis ... sarcoidosis, mets to the lung ... Halo #Sign #CT #Lung
Etiologies of pulmonary infections according to CT-scan patterns. 
CMV cytomegalovirus, GM galactomannan, HSV herpes simplex virus,
Bacterial pneumonia - Aspergillosis ... Actinomyces - Aspergillosis ... Bacterial pneumonia - Aspergillosis ... Patterns #Pulmonary #Lung
Hemoptysis - Differential Diagnosis Framework
Airways: 
 • Bronchitis
 • Bronchiectasis
 • Malignancy: Primary bronchogenic CA, Endobronchial
westermani, PNA, Lung ... abscess, Aspergillosis
Bronchiectasis - Permanent dilation of an airway
WHAT CAN YOU SEE ON CT?
1) Lack of tapering of
segment or lobe of lung ... involving both lungs ... Bronchopulmonary Aspergillosis
Reversed Halo Sign - Infectious and Non-Infectious Differential Diagnosis
Definition: A focal rounded area of GGO surrounded
Mucormycosis, Invasive aspergillosis ... Dermatomyositis, Lung
Mucoid impaction
Mucus plugs or mucoid impaction can mimick the appearance of lung nodules or a mass.
Sometimes
appearance of lung ... bronchopulmonary aspergillosis ... structures in the right lung
Hemoptysis - Differential Diagnosis Framework
Massive Hemoptysis: >150-300 mL in 24h
Airway disease: 
 • Bronchitis, Bronchiectasis, Malignancy
Dengue), Fungal (Aspergillosis ... Malignancy: Primary lung ... Postprocedural, Lung
Differential Diagnosis for Concurrent Brain and Lung Infections
 • Bacteria: Strep anginosus, Staph aureus, Klebsiella pneumoniae
Concurrent Brain and Lung ... Toxoplasmosis • Fungi: Aspergillosis ... ID_fellows #Brain #Lung
Approach to Eosinophilic Lung Diseases
 • Acute Eosinophilic Pneumonia (< 1 wk) - ~30yo, M; Recent
to Eosinophilic Lung ... Bronchopulmonary Aspergillosis ... #Eosinophilic #Lung
Air Crescent Sign on Chest CT
 • Crescentic or circumferential rim of radiolucent airspace within a
DDx: Invasive aspergillosis ... Crescent #Sign #CT #Lung