PMC5732554_01
At the time of admission, necrosis of the left distal thumb phalanx was observed and an injection mark (black circle) was visible in the proximal portion of the radial styloid process.
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At the time of admission to our hospital, necrosis from the interphalangeal joint to the distal end on the left thumb was observed and an injection mark was visible in the proximal portion of the radial styloid process (Figure 1).
(A) The radial artery normally passes through the entire radial bone (arrow). (B) and (C) In the present patient, angiographic computed tomography revealed a variation of the radial artery where it was coursing above the styloid process as a superficial dorsal antebrachial artery (arrows).
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Variation in the superficial dorsal antebrachial artery was identified on angiographic CT (Figure 2).