"pseudoarthrosis -->
pseudarthrosis


A pathologic entity characterised by deossification of a weight-bearing long bone, followed by bending and pathologic fracture, with inability to form normal callus leading to existence of the \"false joint\" that ...

"pseudoarthrosis -->
pseudarthrosis


A pathologic entity characterised by deossification of a weight-bearing long bone, followed by bending and pathologic fracture, with inability to form normal callus leading to existence of the \"false joint\" that gives the condition its name.


Pseudoarthrosis is the formation of a false joint caused by the failure of the bones to fuse. This most commonly occurs when the bones do not heal properly after a fracture.



Pseudoarthrosis usually causes pain, because the two bones are moving against each other, instead of being fused together. This movement may cause problems with metal screws or other hardware used to fuse the bones together. Additional surgery may be required to align the bones and fuse them together.





Pseudarthrosis, a false joint associated with abnormal movement at the site. Congenital pseudoarthrosis refers to a spontaneous fracture which progresses to non union, this is rarely present at birth but commonly develops during the first 18 months of life. The tibia is the most frequently affected site associated with congenital anterolateral tibial bowing in neurofibromatosis which progresses to pseudoarthrosis (see tibial pseudarthrosis). Congenital pseudoarthrosis may also occur in the fibula, radius, ulna, femur and clavicle, when it is seen on the right. Pseudoarthrosis may appear when bone fails to bridge the gap following a traumatic fracture, especially if it becomes infected, surgical osteotomy, arthrodesis or fusion operation. Chronic joint dislocation may be complicated by formation of a pseudoarthrois, this is most commonly seen at the hip where a superolaterally displaced femoral head may form a false articulation with the ilium.

Pseudarthrosis may also develop at sites of accessory ossification and cause pain. Typically, this is seen in the navicular bone. It is also a common complication of incomplete tarsal coalition with a fibrous bar. The edges of the lesion are irregular in tarsal coalition but are smooth and rounded in other pseudarthroses.



Tibial pseudarthrosis, congenital anterior tibial bowing (see tibial bowing anterior), which progresses to spontaneous fracture and subsequent fibrous nonunion. The fracture is rarely present at birth but commonly develops during the first 18 months of life.

Radiographs initially show bowing of the tibia convex anteriorly or anterolaterally with narrowing of the tibial shaft and sclerosis encroaching on the medullary cavity at the apex. The apex of the curve is typically at the junction of the middle and distal thirds of the tibial shaft. Following fracture and nonunion radiographs often show a pointed distal fragment and cupped proximal fragment which fit together to form a false joint. There is often associated tibial shortening. In approximately 50% of cases tibial pseudarthrosis (Fig.1) is associated with neurofibromatosis and in such cases there may be a lytic lesion seen within the tibia. This is often in the distal third of the shaft but can occur at any level.



Congenital pseudoarthrosis of the radius. Congenital pseudoarthrosis of the radius (CPR) is rare. Only ten cases seem to have been found in the literature. Congenital pseudoarthrosis of the radius usually is associated with neurofibromatosis or fibrous dysplasia. This is a report of a congenital pseudoarthrosis of the left radius associated with congenital dislocation of the left hip in a five-month-old girl. Apart from the pseudoarthrosis, there were no visible abnormalities. This patient was treated successfully with excision of the pseudoarthrosis, shortening osteotomy of the ulna, grafting, and intramedullary fixation of both the radius and the ulna. Review of the literature disclosed the extreme difficulties in treating this condition. It was also found that vascularized fibular graft has been used successfully.

Tibial pseudarthrosis

AP (a) and lateral (b) radiographs in a child with neurofibromatosis, demonstrating anterior bowing and pseudarthrosis of the distal tibial and fibular shafts"

Pseudoarthrosis is a false joint associated with false movement at the site. It may appear when bone fails to bridge the gap flollowing a traumatic fracture, especially if it becomes infected. Chronic joint dislocation may be complicated by the formation of pseudoarthrosis. Check out this site:
www.e-radiography.net/radpath/p/pseudoarthrosis.ht
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Pseudarthrosis, a false joint associated with abnormal movement at the site. Congenital pseudoarthrosis refers to a spontaneous fracture which progresses to non union, this is rarely present at birth but commonly develops during the first 18 months of life. The tibia is the most frequently affected site associated with congenital anterolateral tibial bowing in neurofibromatosis which progresses to pseudoarthrosis.

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Pseudarthrosis, a false joint associated with abnormal movement at the site. Congenital pseudoarthrosis refers to a spontaneous fracture which progresses to non union, this is rarely present at birth but commonly develops during the first 18 months of life. The tibia is the most frequently affected site associated with congenital anterolateral tibial bowing in neurofibromatosis which progresses to pseudoarthrosis.

Congenital pseudoarthrosis may also occur in the fibula, radius, ulna, femur and clavicle, when it is seen on the right. Pseudoarthrosis may appear when bone fails to bridge the gap following a traumatic fracture, especially if it becomes infected, surgical osteotomy, arthrodesis or fusion operation. Chronic joint dislocation may be complicated by formation of a pseudoarthrois, this is most commonly seen at the hip where a superolaterally displaced femoral head may form a false articulation with the ilium.
Pseudarthrosis may also develop at sites of accessory ossification and cause pain. Typically, this is seen in the navicular bone. It is also a common complication of incomplete tarsal coalition with a fibrous bar. The edges of the lesion are irregular in tarsal coalition but are smooth and rounded in other pseudarthroses.

A false joint. May result from fracture within long bone that does not heal in some people with neurofibromatosis