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

C = cancer
mnemonic for the causes ... of a cavitating lung ... - bronchogenic cyst ... #Diagnosis # ... #Differential #Lung
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
, like cyst, cavity ... since in many cases ... we describe a chest ... #Cyst #Lung #Pulmonary ... #Diagnosis #Radiology
CAVITY Mnemonic for Causes of Cavitary Lung Lesions

C - Cancer (SCC, mets)
A - Autoimmune (GPA, RA)
V
for Causes of Cavitary ... Lung Lesions ... , bronchogenic cyst ... #Cavitary #Lung ... #Differential #Diagnosis
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the differential diagnosis ... the surrounding lung ... associated pulmonary ... #Radiology #CTChest ... #Cavity #Cyst #
Mediastinal Mass - Differential Diagnosis
Anterior Mediastinal Mass:
 • Thymus (Thymoma, carcinoma, hyperplasia, cyst)
 • Lymphoma
 •
- Differential Diagnosis ... Sarcoma, Metastatic Lung ... Tumors • Vascular Mases ... #Differential #Diagnosis ... #pulmonary #anterior
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Emphysema - Lung ... cysts (LAM, LIP ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... TractionBronchiectasis #Cysts
Stridor - Differential Diagnosis Framework:
High-pitched, variable respiratory sound

ETIOLOGIES:
Infectious:
 • Retropharyngeal abscess
 • Acute epiglottitis
 • Peritonsillar
- Differential Diagnosis ... High-pitched, variable respiratory ... • Bronchogenic cyst ... • Recurrent respiratory ... #causes #pulmonary
Water Lily Sign (Camalote Sign) on Chest CT
 • Hydatid cyst in the lung with a
Camalote Sign) on Chest ... CT • Hydatid cyst ... in the lung with ... • DDx: Hydatid cyst ... #Pulmonary #diagnosis
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
- Differential Diagnosis ... : Interstitial lung ... failure • There are gravity-dependent ... bypassing the lungs ... #Differential #Diagnosis
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
attached to the chest ... cyst in the upper ... is a possible diagnosis ... airways leading to pulmonary ... cyst formation