24 results
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
Dyspnea (underlying lung ... disease or CHF) ... refer + order CT ... History of cancer, lung ... Diagnosis #Algorithm #causes
Bronchiectasis - Permanent dilation of an airway
WHAT CAN YOU SEE ON CT?
1) Lack of tapering of
CAN YOU SEE ON CT ... involving both lungs ... Rheumatologic/Autoimmune ... diseae 7) Recurrent ... pulmonary #diagnosis #differential
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
• Most common cause ... seen • Chest CT ... Abscess Differential ... Abscess #pulmonary #differential ... #causes #management
Back Pain - Differential Diagnosis
Primary Back Pathology:
 • Musculoligamentous injury (a.k.a. lumbosacral strain)
 • Spondylosis (i.e.
Back Pain - Differential ... (most common: lung ... (most common: lung ... , Aneurysm • Pancreas ... #Diagnosis #causes
Elevated Transaminases / Transaminitis - Differential Diagnosis

 • Infectious: HAV, HCV, HEV, EBV, HSV, CMV
 •
Transaminitis - Differential ... CA, small cell lung ... Metabolic: Wilson Disease ... obstruction syndrome • Autoimmune ... #Diagnosis #causes
Rapidly Growing Mycobacterial Infections

 • Mycobacterium abscessus - Is the most pathogenic and the most likely
most likely to cause ... with underlying lung ... It can also cause ... Mycobacterium #diagnosis #differential ... #infectiousdiseases
Hemoptysis - Differential Diagnosis Framework
Massive Hemoptysis: >150-300 mL in 24h
Airway disease: 
 • Bronchitis, Bronchiectasis, Malignancy
in 24h Airway disease ... Malignancy: Primary lung ... Rheumatologic / Autoimmune ... Postprocedural, Lung ... Diagnosis #pulmonary #causes
Nontuberculous Mycobacteria (NTM) Infections 

Mycobacterial species other than those belonging to the Mycobacterium tuberculosis complex and
status • Chronic lung ... status NTM Cause ... Imaging, high res CT ... NTM #Infections #differential ... #diagnosis #infectiousdiseases
Common Variable Immunodeficiency (CVID)

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

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
in HIV - Differential ... Diagnosis Framework Disease ... angioinvasive disease ... • CT: Halo sign ... #diagnosis #infectiousdiseases