Presentation
Incidental finding, The patient injured his right forearm and wrist playing football.
Patient Data
There are no acute post-traumatic bony abnormalities of the symptomatic right distal forearm and wrist. There is an incidental contralateral partial or incomplete osseous lunotriquetral coalition (synostosis). There is likely a right-sided non-osseous lunotriquetral coalition with suspicious joint space narrowing and mild subchondral sclerosis. The scapholunate interval is not widened bilaterally.
Case Discussion
Lunotriquetral coalition represents the most common type of congenital carpal coalition.
It is commonly bilateral. Consistent with the different types of the coalition, it can be fibrous (syndesmosis), cartilaginous (synchondrosis), or osseous (synostosis).
In this instance, there is an incidental partial or incomplete osseous left lunotriquetral synostosis (type 2 de Villiers classification) and a suspected non-osseous right-sided lunotriquetral coalition (type 1 de Villiers classification). The patient was asymptomatic.