44 results
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... : 'signet ring sign ... emphysema: no walls ... #Radiology #CTChest ... Comparison #Table #RadiologyAssistant
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
"Terry Thomas" sign ... ("Terry Thomas sign ... • Mechanism: Fall ... Scaphoid #Carpal #Radiology ... Orthopedics #Sports #MSK
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
"pooping duck sign ... • Mechanism: Fall ... Wrist #Carpal #Radiology ... #XRay #Diagnosis ... Orthopedics #Sports #MSK
Femoral Head Fracture: Pathogenesis and clinical findings
 • Posterior hip dislocation -> Impaction force from femoral
femoral head • Falls ... onto lateral hip Signs ... FemoralHead #Fractures #msk ... #diagnosis #pathophysiology ... #signs #symptoms
Hilar and mediastinal lymphadenopathy
In sarcoidosis the common pattern is right paratracheal and bilateral hilar adenopathy ('1-2-3-sign').
In
adenopathy ('1-2-3-sign ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
Supracondylar Elbow Fracture
• Most common elbow fracture in children, peak age 5-7 
• When looking at
anterior sail sign ... • Mechanism: Fall ... Elbow #Humerus #Radiology ... #XRay #Diagnosis ... #Orthopedics #MSK
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
The diagnosis of ... dilatation (signet-ring sign ... A signet-ring sign ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
Anterior Shoulder Dislocation: Pathogenesis, clinical, and radiographic findings

Trauma, Fall on, outstretched arm, Overhead throwing => Abduction
findings Trauma, Fall ... #Dislocation #Diagnosis ... #signs #symptoms ... #msk #orthopedics
Whenever you see an area of increased density within the lung, it must be the result
pathologic process that fills ... #Diagnosis #Radiology ... Consolidation #Patterns #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
interstitium or alveolar walls ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary ... #Differential #RadiologyAssistant