26 results
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
: 'signet ring sign ... Clinical #Diagnosis #Radiology ... #CTChest #Cystic ... #Cysts #Differential ... #Comparison #Table
Diagram of different types of bone tumors that can occur around the knee on XRay -
sequestrum, cloaca, and ... blade of grass sign ... #Differential # ... Radiology #XRay ... #msk #lesions #adult
Diagram of different types of bone tumors that can occur around the knee on XRay
Age <
bone cyst • Osteoid ... blade of grass sign ... #Differential # ... Diagnosis #Radiology ... #XRay #MSK #pediatrics
Primary Bone Tumors - Differential Diagnosis Algorithm 

Metastatic - Most common tumour in adults
 - Breast
- Differential ... Cyst Malignant ... Tumours #MSK #Differential ... Diagnosis #Algorithm #Orthopedics ... Causes #Oncology #Radiology
Mallet Finger
Absence of a fracture does NOT exclude Mallet finger, the extension function of the DIP
disruption (may be bony ... Discharge with orthpedic ... #Radiology #XRay ... Diagnosis #Management #Hand ... #Orthopedics #MSK
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
fractured carpal bone ... "pooping duck sign ... common carpal bone ... Wrist #Carpal #Radiology ... #Sports #MSK
Bone Tumor Location within the Skeleton

Epiphysis: 
Only a few lesions are located in the epiphysis, so
cyst must be added ... to the differential ... Fibrous dysplasia and ... Diaphysis #Epiphysis #Radiology ... #MSK #Differential
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
between all carpal bones ... "Terry Thomas" sign ... onto outstretched hand ... Scaphoid #Carpal #Radiology ... #Sports #MSK
Supracondylar Elbow Fracture
• Most common elbow fracture in children, peak age 5-7 
• When looking at
bone cortex • ... anterior sail sign ... can't make A-OK sign ... Elbow #Humerus #Radiology ... #MSK
Estimated Medical Radiation Doses for 5 Year-Old Child

3-view ankle	0.0015 mSv	1/14th CXRs
2-view chest	0.02 mSv	1 CXRs
Anteroposterior and lateral
Anteroposterior and ... 99m radionuclide bone ... 200 CXRs Chest ... #PatientInfo #Radiology ... Nuclear #Comparison #Table