Congenital bilateral isolated fifth metacarpal agenesis

Pathological fracture in a patient with an untreated congenital metacarpal synostosis

“…The authors stated that there, the fifth metacarpal head was joined to the fourth metacarpal, which in turn 'carried' the little finger. Another case report presented a similar radiographic formation including a pseudo-joint between the little finger and the fourth metacarpal (Eren et al, 2012). However, in light of the radiographic changes in our case from shortly after birth to the latest radiographs, it seems likely that both these cases were rather metacarpal synostoses of the same classification as ours, which presented later as 'absent' metacarpals.…”

“…Comparison of the radiographs obtained before the trauma (Figure 2(a)) -possibly due to developing symptoms -with those after the trauma revealed that the patient had sustained a diaphyseal metacarpal fracture of the fourth metacarpal (Figure 2(b) and (c)). The fifth metacarpal was hardly visible as it was superimposed over the fourth metacarpal, mimicking cases with congenitally absent fifth metacarpals (Eren et al, 2012). However, it was evident that the short fifth metacarpal had caused a pathological fracture due to chronic pressure of its head towards the fourth metacarpal shaft (Figure 2(b) and (c)).…”

Results of primary end-to-side digital nerve neurorrhaphy in eight patients

“…was joined to the fourth metacarpal, which in turn 'carried' the little finger. Another case report presented a similar radiographic formation including a pseudo-joint between the little finger and the fourth metacarpal (Eren et al, 2012). However, in light of the radiographic changes in our case from shortly after birth to the latest radiographs, it seems likely that both these cases were rather metacarpal synostoses of the same classification as ours, which presented later as 'absent' metacarpals.…”

Reconstruction for Congenital Absence of the Fifth Metacarpal

“…As a rare condition, complete or partial absence of the fifth metacarpal presents challenges in surgical management based on the spectrum of the abnormality and overall functionality of the patient. As summarized by Eren et al, 4 management should be individualized for each patient. Case reports on the topic provide a framework for both patient counseling, treatment options, and surgical considerations for varying phenotypes of this deformity.…”

“…A review of literature reveals only seven cases of fifth metacarpal agenesis (one patient with bilateral hand involvement). 3 , 4 , 5 …”