18 results
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
polymicrobial infection ... • Most common cause ... pneumonia • Chronic ... CT Lung Abscess ... westermani • Other: TB
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
sweats, chills (infection ... ) • Abnormal CXR ... refer + order CT ... disease #Chronic ... Diagnosis #Algorithm #causes
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
• Silicosis • Chronic ... abscess Primary ... malignancy, and chronic ... and Culture • CXR ... • Check CXR and
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
• Silicosis • Chronic ... abscess Primary ... malignancy, and chronic ... and Culture • CXR ... • Check CXR and
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
inflammation causes ... : TB, NTM, PNA ... in the adjacent lung ... CT) • Broncho-arterial ... mycobacteria Treatment
Pulmonary Infections in HIV-AIDS
Bacterial: 
 • No organism identified, Strep pneumoniae, H. influenzae, S.aureus, Streptococcus Grp
failure, COPD, Lung ... +/- High res CT ... chest scan), CBC ... Fungal, AFB), TB ... Diseases Fellows
Nontuberculous Mycobacteria (NTM) Infections 

Mycobacterial species other than those belonging to the Mycobacterium tuberculosis complex and
lung disease ... status NTM Cause ... lung infections ... Kansasii: • Mimics TB ... Imaging, high res CT
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
Autoimmunity • Chronic ... lung disease ... Chest CT: • Ground-glass ... DDX - Other causes ... Malignancies • Chronic
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... • CT: Halo sign ... Abdominal pain, chronic ... factor • May cause ... infiltrates, mimicking TB
Cavitation - Pneumonia
In virulent pyogenic infections an abscess may form within the consolidated lung as a
an abscess may ... the consolidated lung ... like TB, cavities ... one month after treatment ... Clinical #Radiology #CXR