24 results
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
Affects 1:25,000 ... • Chronic lung ... Chest CT: • Ground-glass ... and M panel Management ... #diagnosis #management
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Fevers and/or chills ... Nasal polyps and signs ... in the adjacent lung ... of the affected lung ... high-resolution chest CT
Bronchiectasis - Permanent dilation of an airway
WHAT CAN YOU SEE ON CT?
1) Lack of tapering of
CAN YOU SEE ON CT ... Immunodeficiency 3) Infection ... Obstruction 6) Rheumatologic ... Bronchiectasis #pulmonary ... #diagnosis #differential
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
Lung Abscess - Diagnosis ... polymicrobial infection ... 38 degrees • Chills ... seen • Chest CT ... #Abscess #pulmonary
Polo Mint Sign on Chest CT
 • Partial filling defect in a blood vessel surrounded by
Polo Mint Sign on ... filling defect ... #Polo #Mint #Sign ... #CT #Lung #Pulmonary ... #diagnosis #radiology
Mycoses

HISTOPLASMOSIS
• Inhalation of conidia → Yeast → travel to lymph nodes → spread in body
• Bird
Fever, cough, chills ... symptoms • Rheumatologic ... change in the lungs ... nails, bronchi, lungs ... #Management #Infections
Emphysematous Cystitis
Epidemiology:
 • Usually middle-aged diabetic women
 • Other RF: neurogenic bladder, urinary tract outlet obstruction,
may have fever/chills ... be present or signs ... of infection, such ... , specifically CT ... #management
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... - Differential Diagnosis ... • CT: Halo sign ... #Infections #HIV ... #AIDS #pulmonary
Pulmonary Renal Syndromes - OnePager Summary
Autoimmune ANCA vasculitis (AAV): GPA (granulomatous with polyangiitis), EGPA (eosinophilic granulomatosis
Other tests: • CT ... confirm DAH, r/o infection ... sparing of the lung ... seen on chest CT ... #management #treatment
Hemophagocytic Lymphohistiocytosis (HLH)
Definition: Overwhelming clinical syndrome associated with excessive macrophage activation and cytokine storm due to
most frequently affects ... : HLH signs and ... can mimic common infections ... #management #treatment ... #hematology