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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
result in decreased lung ... These include: - Emphysema ... - Lung cysts (LAM ... #Diagnosis #Radiology ... #Pulmonary #CTChest
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM ... Centrilobular emphysema ... central dot. - LIP #Clinical ... #Diagnosis #Radiology ... #CTChest #Cystic
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Vessel Sign on Chest ... CT • Distinct pulmonary ... leading into a lung ... #Pulmonary #diagnosis ... #radiology #clinical
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung ... #Clinical #Diagnosis ... #Radiology #CTChest ... Cystic #Comparison #LAM
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
attached to the chest ... is a possible diagnosis ... LAM is a rare lung ... airways leading to pulmonary ... #Clinical #Radiology
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
Halo Sign on Chest ... sarcoidosis, mets to the lung ... Halo #Sign #CT #Lung ... #Pulmonary #diagnosis ... #radiology #clinical
Pulmonary Embolism on POCUS Echocardiogram

Mid 30's female with chest pain/dyspnea.  Triage EKG (no prior).
's female with chest ... Differential/diagnosis ... Activate cath lab ... Echocardiogram #A4c #clinical ... #cardiology #McConnells
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
pneumatocele, emphysema ... we describe a chest ... with a thin wall Emphysema ... #Pulmonary #Diagnosis ... #Radiology
Empyema Necessitans (EN) on Chest POCUS

Pulmonary teaching case: you are called to the bedside of a
(EN) on Chest POCUS ... - What’s the diagnosis ... #clinical #video ... #POCUS #pulmonary ... #Lung
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the surrounding lung ... without associated pulmonary ... emphysema. ... #Clinical #Diagnosis ... #Radiology #CTChest