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RADIX Anatomy Exit
Name the arrowed structure
Question 1 of 4Multiple choice
Name the arrowed structure.
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RADIXAnatomy
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Abdomen
62%
Thorax
41%
MSK
71%
Pelvis
48%
Vascular
35%
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Name the arrowed structure.
Modality
Radiograph
Region
msk
Difficulty
easy
Head of the radius
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Head of the radius
Location
The head of the radius is a disc-shaped, cylindrical structure at the proximal end of the radius, located on the lateral aspect of the elbow joint just distal to the elbow joint line.
Relationship
It articulates superiorly with the capitellum of the humerus at the radiocapitellar joint and medially with the radial notch of the ulna to form the proximal radioulnar joint; it is encircled by the annular ligament and lies lateral to the radial tuberosity and biceps tendon insertion.
Recognition cue
On radiograph, the radial head appears as a rounded, slightly concave superior surface articulating smoothly with the capitellum on both AP and lateral views; on the lateral view it should be bisected by a line drawn through the capitellum (radiocapitellar line) - malalignment suggests dislocation.
Pearl
A visible posterior fat pad sign on the lateral elbow radiograph is a subtle but important indicator of an occult radial head fracture, even when the fracture line itself is not directly visible.
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0
Predicted score
of 200 · 6 marks short0
Questions done
of 780
Days to exam
11 Nov 202612-day streak
domain signal
Abdomen62%
Thorax41%
MSK71%
Pelvis48%
Vascular35%
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Predicted CR1 score
104/200 · 6 marks short of the pass
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Abd.Abdomen & pelvis
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