The ulnar styloid is the small process (bump) that protrudes at the wrist opposite the thumb and serves as an attachment site for the ulnar collateral ligament which joins the ulna and two of the carpal bones and facilitates wrist stability.
Ulnar styloid fractures seldom require treatment when they occur in association with a distal radius fracture. The major exception is when the joint between these bones, the distal radioulnar joint (or DRUJ), is unstable. When the DRUJ is unstable, the ulnar styloid may require independent treatment. The head is separated from the styloid process by a depression for the attachment of the apex of the triangular articular disk, and behind, by a shallow groove for the tendon of the extensor carpi ulnaris muscle. styloid process of ulna. n. A cylindrical, pointed projection from the medial and posterior aspect of the head of the ulna, to the tip of which is attached the ulnar collateral ligament of the wrist.  over ulnar styloid process to its insertion into the side of 5th metacarpal base; - Exam: - ulnar styloid process: on the distal tip of the ulnar styloid process, you should feel small, shallow dorsal groove running longitundinally; - ECU tendon runs thru this groove; - it is most easily palpated when hand is radiallly deviated & tendon is contracted The contact point between the too-long tip of the ulnar styloid and the triquetrum (wrist) bone starts to get inflamed and swell up. There can be bone bruising and bone edema as well. Pain along the ulnar side of the wrist is a hallmark finding. But the diagnosis can be difficult to make. The natural history of ulnar styloid impaction (i.e., what happens without treatment) is as follows. At first, the impingement just causes pain. But after a while, pressure builds up from the styloid process (tip) pressing against the triangular fibrocartilage complex or TFCC ligament. Ulnar styloid impaction refers to a condition causing that pain because there is a short ulna (one of the two bones of the forearm) and a long styloid. The styloid is a piece of bone at the end of the ulna that makes the ulna look longer on one side compared to the other. The styloid is a normal feature of the ulnar bone but when it is too long, it presses against the bones of the wrist. In particular, the triquetrum bone in the wrist gets compressed. The natural history of ulnar styloid impaction (i.e., what happens without treatment) is as follows. At first, the impingement just causes pain. But after a while, pressure builds up from the styloid process (tip) pressing against the triangular fibrocartilage complex or TFCC ligament. Ulnar Styloid The ulnar styloid is the small process (bump) that protrudes at the wrist opposite the thumb and serves as an attachment site for the ulnar collateral ligament which joins the ulna and two of the carpal bones and facilitates wrist stability.  From Wikipedia, the free encyclopedia. The styloid process of the ulna is found at distal end of the forearm, and projects from the medial and back part of the bone; it descends a little lower than the head, and its rounded end affords attachment to the ulnar collateral ligament of the wrist. The head is separated from the styloid process by a depression for the attachment of the apex of the triangular articular disk, and behind, by a shallow groove for the tendon of the extensor carpi ulnaris muscle. First of all, ulnar-sided wrist pain is located on the little finger side. Ulnar styloid impaction refers to a condition causing that pain because there is a short ulna (one of the two bones of the forearm) and a long styloid. The styloid is a piece of bone at the end of the ulna that makes the ulna look longer on one side compared to the other. The styloid is a normal feature of the ulnar bone but when it is too long, it presses against the bones of the wrist. In particular, the triquetrum bone in the wrist gets compressed. The natural history of ulnar styloid impaction (i.e., what happens without treatment) is as follows. At first, the impingement just causes pain. But after a while, pressure builds up from the styloid process (tip) pressing against the triangular fibrocartilage complex or TFCC ligament.
https://en.wikipedia.org/wiki/Ulnar_styloid_process http://medical-dictionary.thefreedictionary.com/styloid+process+of+ulna http://www.wheelessonline.com/ortho/ulnar_styloid_process_frx http://education.spearcenter.com/Injuries-Conditions/Wrist/Research-Articles/Ulnar-Styloid-Impaction-Syndrome/a~5030/article.html http://www.peakphysicaltherapy.com/Injuries-Conditions/Wrist/Research-Articles/Ulnar-Styloid-Impaction-Syndrome/a~5030/article.html https://www.wristsupportbraces.com/m-25-ulnar-styloid.aspx https://en.wikipedia.org/wiki/Ulnar_styloid_process http://education.spearcenter.com/Injuries-Conditions/Wrist/Research-Articles/Ulnar-Styloid-Impaction-Syndrome/a~5030/article.html
what is ulnar styloid