Coalition of trapezoid, capitate, and metacarpal: a case report.

Carpal coalition is a rare wrist anomaly. A coalition can be an isolated condition, but it can be observed as a component of a congenital syndrome as well. Carpal coalition is usually asymptomatic and detected incidentally. It is most frequently encountered as lunate-triquetral coalition, followed by capito-hamate coalition. Other coalition types are very rare. In this case report, we present a case in which the patient applied with complaints of pain, and in whom a coalition of capitate-trapezoid- second and third metacarpal was detected.

Six new examples of the bipartite trapezoid bone: morphology, significant population variation, and an examination of pre-existing criteria to identify bipartition of individual carpal bones.

Carpal bone bipartition is a developmental variant resulting in the division of a normally singular carpal into two distinct segments. Cases involving the scaphoid are best known, though many other carpals can be affected, including the trapezoid. Six new examples of bipartite trapezoids, identified in African and Asian anatomical and archeological samples, are reported here and compared with the eight previously known. While the site of bipartition is consistent, the resulting segments exhibit variability in their articulations with neighboring carpals. Five of the six affected trapezoids were identified in African or African-derived samples, yielding a significantly higher frequency (0.323%) of bipartite trapezoid than seen in anatomical or archeological series of European origin. Bilateral bipartite trapezoids in archeological remains from the Mid Holocene site of Gobero (Niger) are potentially the oldest bipartite carpals yet identified in humans. Their discovery may indicate that trapezoid bipartition is a condition that has been present in African populations since prehistoric times, though more data are needed. Because bipartite carpals may be symptomatic and can occur as part of syndromes, the significant population variation in frequency identified here has potential utility in both anatomical and clinical contexts. However, a comparison of the morphological appearance of bipartite trapezoids with the suggested criteria for bipartite scaphoid diagnosis indicates that these criteria are not equally applicable to other carpals. Fortunately, due to the rarity of fracture, identification of the bipartite trapezoid and separating it from pathological conditions is considerably easier than diagnosing a bipartite scaphoid.

Carpal coalition: symptomatic incomplete bony coalition of the capitate and trapezoid--case report.

We present a case of symptomatic, incomplete bony carpal coalition between capitate and trapezoid. We describe previous case reports and possible therapeutic options.

Congenital fusion of the trapezium and trapezoid.

We report an unusual case of carpal coalition between trapezium and trapezoid in a 54-year-old man who was diagnosed after a pain in left wrist following a night's sleep. The patient was otherwise asymptomatic.