46 results
Lung Abscess
Microbiology:
 • Polymicrobial 
 • Anaerobes (most common) 
Clinical: 
 • Indolent symptoms that evolve
Lung Abscess Microbiology ... most common) Clinical ... meropenem) #Lung ... Diagnosis #Pulmonary #Clinical
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 ... diagnosis #radiology #clinical
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 ... diagnosis #radiology #clinical
Cotton Wool Spots

Caused by microinfarcts. Exploded ganglion cell axons extrude their axoplasm into retina. Long DDx:
Long DDx: hypertension ... ophthalmology #Clinical
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
• Avg age of DX ... to 8 years Clinical ... • Chronic lung ... lymphocytic interstitial lung ... DDX - Other causes
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
of interstitial lung ... Organizing Pneumonia - Clinical ... Diagnosis: • Lung ... TBNA or Surgical lung ... Anti-dsDNA, ANCA COP DDX
Acute Respiratory Distress Syndrome – ARDS: Clinical Cheat Sheet

An acute diffuse, inflammatory lung injury, leading to
Syndrome – ARDS: Clinical ... , inflammatory lung ... permeability, lung ... with decreased lung ... >14 days after dx
Nontuberculous Mycobacteria (NTM) Infections 

Mycobacterial species other than those belonging to the Mycobacterium tuberculosis complex and
infections Lungs ... to NTM: Chronic lung ... Pulmonary Disease: Clinical ... Disease: • Clinical ... diagnosis • Microbiologic
Nocardiosis - Nocardia spp
Pathogen: Filamentous gram-positive branching rod, grows in acid fast staining and anaerobic conditions
Clinical
anaerobic conditions Clinical ... 9%, up to 20% lung ... diagnosis #management #microbiology
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 ... characteristic features Clinical