According to Pfitzner, the trapezium secondarium is one of four potential secondary ossification centres lying around the primary ossification centre of the trapezium that may remain as separated bones 4. The other sites include the epitrapezium adjacent to the scaphoid, the paratrapezium most lateral and the praetrapezium lying on the palmar surface of the trapezium 4.
It may be visualised sitting between the 1st and 2nd bases of each respective metacarpal bone on lateral and oblique hand radiographs 3.
- 1. Timins ME. Osseous anatomic variants of the wrist: findings on MR imaging. AJR. American journal of roentgenology. 173 (2): 339-44. doi:10.2214/ajr.173.2.10430131 - Pubmed
- 2. Rushforth, A.F. (1949) A congenital abnormality of the trapezium and first metacarpal bone. J. Bone Joint Surg. (Br.) 31:543-546
- 3. Donna G. Blankenbaker, Kirkland W. Davis. Diagnostic Imaging: Musculoskeletal Trauma. ISBN: 9780323442954
- 4. A CONGENITAL ABNORMALITY OF THE TRAPEZIUM AND FIRST METACARPAL BONE. Bone & Joint Journal. 31-B (4): 543. Pubmed