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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 ... LowAttenuation #Differential
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung ... cysts. ... #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 ... cyst in the upper ... is a possible diagnosis ... LAM is a rare lung ... #Clinical #Radiology
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... Cystic LCH: - LAM ... #Diagnosis #Radiology ... #CTChest #Cystic ... #Cysts #Differential
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Vessel Sign on Chest ... CT • Distinct ... #Vessel #Sign #CT ... #diagnosis #radiology ... #clinical
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
CT • SPN or mass ... #Halo #Sign #CT ... #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Water Lily Sign (Camalote Sign) on Chest CT
 • Hydatid cyst in the lung with a
CT • Hydatid cyst ... • DDx: Hydatid cyst ... Sign #Camalote #CT ... #diagnosis #radiology ... #clinical
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
In the differential ... diagnosis there ... the surrounding lung ... #Clinical #Diagnosis ... #Radiology #CTChest
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
throughout the lungs ... Differential Diagnosis ... #Radiology #differential ... #CXR #clinical ... #CT
Primary Bone Tumors - Differential Diagnosis Algorithm 

Metastatic - Most common tumour in adults
 - Breast
Diagnosis Algorithm ... - Thyroid - Lung ... Aneurysmal Bone Cyst ... Tumors #Tumours #MSK ... Causes #Oncology #Radiology