69 results
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
lesions • 80% with lung ... splenomegaly Other infections ... multiple lesions Infectious ... Sarcoidosis • Neuro ... diagnosis #causes #radiology
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
• Avg age of DX ... • Chronic lung ... disease • Infectious ... lymphocytic interstitial lung ... DDX - Other causes
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
leading into a lung ... • DDx: Septic ... infarction, mets to the lung ... Vessel #Sign #CT #Lung ... Pulmonary #diagnosis #radiology
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
circumferential GGO • DDx ... sarcoidosis, mets to the lung ... Halo #Sign #CT #Lung ... Pulmonary #diagnosis #radiology
Common Infections in a Hospitalized Patient - GRUBS-C Mnemonic

G - GI (-itis): Cholecystitis, Pancreatitis, Peritonitis, Appendicitis,
Common Infections ... pneumonia, empyema, lung ... Encephalitis #Infections ... GRUBSC #Mnemonic #ddx
Monod Sign on Chest CT
 • Air surrounding a fungal ball in a preexisting pulmonary cavity
pulmonary cavity • DDx ... Monod #Sign #CT #Lung ... Pulmonary #diagnosis #radiology
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
sweats, chills (infection ... serious underlying dx ... Dyspnea (underlying lung ... History of cancer, lung
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
affecting the lungs ... disease • DM DDX ... • Lymphoma • Lung ... • Progressive lung ... • Upper lobe lung
Co-occurrence of Lung-Brain Infections
When we hear a patient w/ co-occurrence of lung-brain infection, Nocardia seems to
Co-occurrence of Lung-Brain ... co-occurrence of lung-brain ... infection, Nocardia ... thought, but the Ddx ... #Infections #Lung
Causes of Diffuse Lung Disease. 
Collagen vascular 
 - Scleroderma 
 - Rheumatoid arthritis 
 -
Causes of Diffuse Lung ... cell arteritis Infectious ... #Diagnosis #Radiology ... Causes #Diffuse #Lung