Isolated fractures of the trapezoid bone have been rarely reported in the literature, the mechanism of injury being an axial or bending load transmitted through the second metacarpal. Trapezoid fractures occur when a strong bending or axial force is applied to the second metacarpal base. A correct diagnosis was made in 5 cases on initial evaluation. Being surrounded by the trapezium, capitate, scaphoid, and the second metacarpal, it is often sheltered from minor blows and injuries. Because of its well-protected position in the wrist, traumatic lesions of the trapezoid bone are rare. Common symptom. eCollection 2019. A nondisplaced scaphoid fracture means that the bone has not shifted at all out of position, and the fracture may not even be visible on an x-ray image. Computed tomography obtained due to concern for an occult fracture revealed a comminuted fracture of the trapezoid bone involving the articular surface with an anteriorly displaced bone fragment (Figures 1 and 2). Because the trapezoid is fastened to the trapezium, capitate, and scaphoid by strong ligaments, fracture or dislocation is limited by this rigid fixation. Carpal bone fractures involve the eight bones that form the wrist. This fracture typically occurs due to direct trauma to the hand or wrist. Trapezoid fractures are uncommon in sports. Any of the carpal bones can break, causing a broken wrist. The patient was placed in a … The carpal bones are 8 small bones which make up the wrist. Clin Sports Med. The authors report two cases of isolated, undisplaced, fractures of the trapezoid bone. A trapezoid fracture is a break in the trapezoid bone of the wrist. They account for ~0.4% of all carpal fractures 1. Dislocation of the trapezoid has been reported in 30 patients; fractures are seen even less frequently and us … Get the latest public health information from CDC: https://www.coronavirus.gov, Get the latest research information from NIH: https://www.nih.gov/coronavirus, Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. The next common is a Triquetrum fracture. We reviewed case notes regarding mechanism of injury, fracture pattern, mode of diagnosis, and time to diagnosis and treatment. Trapezoid fractures occur when the second metacarpal butts up against it. A rare isolated trapezoid fracture. The carpal bones are 8 small bones which make up the wrist. They typically occur as the result of axial force through the second metacarpal. The authors present a single bone fracture of the trapezoid in a 40-year-old man. Nagumo, Akira MD; Toh, Satoshi MD; Tsubo, Kenji MD; Ishibashi, Yasuyuki MD; Sasaki, Tomoyuki MD Illustration and x-ray showing a break in the mid-portion, or "waist," of the scaphoid. Background: The trapezoid is the least commonly fractured carpal bone, comprising 4% of all carpal fractures. The injury in our patient may have been a stress fracture or a nonunion of an initial dorsal intra-articular fracture. The trapezoid is the least commonly fractured or even injured among the wrist bones, accounting for only about 2% of all carpal fractures. The trapezium articulates with two of the carpal bones, the scaphoid, and the trapezoid as well as with the first metacarpal bone [7].. Trapezoid bone fracture is the least common fracture owing to the fact that it is strictly bounded to scaphoid, capitate and the base of the second metacarpal. It is conservatively treated without dislocation. Anatomically, the trapezoid is keystone in shape with a dorsal surface width twice that of its palmar surface. Carpal bones fractures comprise upwards of 8 percent of hand fractures . Triquetrum fractures are the second least common fractures among carpal bones. COVID-19 is an emerging, rapidly evolving situation. To date, few articles have been published on isolated trapezoid fractures. Fig 3 Trapezoid rotational bone graft osteotomy: (A) initial length of the metacarpal bone, (B) malunion with angular deformity of α° and shortening of the bone (a). Introduction. The following list attempts to classify Closed fracture of trapezoid bone [smaller multangular] of wrist into categories where each line is subset of the next. (2011) The western journal of emergency medicine. 2. National Center for Biotechnology Information, Unable to load your collection due to an error, Unable to load your delegates due to an error. simple vs. comminuted) integrity of the coracoclavicular ligments conoid (medial) and trapezoid (lateral) provide primary resistance to superior displacement of the lateral clavicle Scaphoid fracture is the most common carpal fracture, occurring predominantly in active men with a peak prevalence in the 2nd to 3rd decades (, 8). The proximal surface of the trapezium, in combination with the surface of the trapezoid, forms a slightly concave facet for articulating with the distal surface of the scaphoid [11]. dorsal intercalated segment instability (DISI), volar intercalated segment instability (VISI), scaphoid nonunion advanced collapse (SNAC), triangular fibrocartilaginous complex (TFCC) injuries, ulnar-sided wrist impaction and impingement syndromes, calcium pyrophosphate dihydrate deposition disease. Check for errors and try again. Yamamoto T, Matsushita T, Ito K, Matsushima S, Yoshida K, Kuroda R. Case Rep Orthop. trapezoid fracture on plain radiographs is generally difficult, as the trapezoid is small and overlaps with other carpal bones. A Scaphoid fracture is the most common wrist fracture. Am J Case Rep. 2019 Jun 5;20:790-793. doi: 10.12659/AJCR.915757. eCollection 2020 Jun. Most trapezoid fractures were diagnosed on computed tomographic scan. The shape and size of this bone and its location below the thumb cause the integrity of the trapezium to deteriorate over time. They are the Scaphoid, Hamate, Lunate, Trapezium, Trapezoid, Capitate and Pisiform. BACKGROUND:Trapezoid fractures are very uncommon, accounting for less than 1% of all wrist fractures. Common location for a fracture on MRI force is applied to the second least common fractures carpal..., Yoshida K, Kuroda R. case Rep Orthop legacy non-billable code used to specify a medical condition a... 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