11 results
CAVITY – a useful mnemonic for the causes of a cavitating lung mass.

C = cancer
mnemonic for the causes ... of a cavitating lung ... pulmonary embolus I = infection ... pulmonary abscess (TB ... #Differential #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
Droplets that contain bacilli ... affecting the lungs ... • Lymphoma • Lung ... • Progressive lung ... Active TB: •
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
Droplets that contain bacilli ... affecting the lungs ... • Lymphoma • Lung ... • Progressive lung ... Active TB: •
Nontuberculous mycobacteria
Nontuberculous mycobacteria, also known as atypical mycobacteria, are all the other mycobacteria which can cause
mycobacteria which can cause ... disease resembling TB ... a patient with active ... upper lobes due to infection ... pus within the cavity
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
polymicrobial infection ... • Most common cause ... Clindamycin in case ... westermani • Other: TB ... #differential #causes
Nontuberculous Mycobacteria (NTM) Infections 

Mycobacterial species other than those belonging to the Mycobacterium tuberculosis complex and
status NTM Cause ... Nodular or cavitary ... Kansasii: • Mimics TB ... with: Cavitary ... • Dyspnea, • Chest
Cavitation - Pneumonia
In virulent pyogenic infections an abscess may form within the consolidated lung as a
virulent pyogenic infections ... the consolidated lung ... granulomatous infection ... like TB, cavities ... Radiology #CXR #CTChest
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Chronic inflammation causes ... Most Common Causes ... : TB, NTM, PNA ... in the adjacent lung ... of the affected lung
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... factor • May cause ... fever, cough and cavitary ... infiltrates, mimicking TB ... #Infections #HIV
Immune Reconstitution Inflammatory Syndrome - Overview of IRIS

What Is IRIS?
	• A state of hyperinflammatory response that
(<100), except TB ... TB - Lymphadenitis ... unintentional weight loss, nausea ... • Leprosy • Bacillus ... • Persistently active