Patellar pseudoarthrosis



Congenital sacral pseudoarthrosis is a general term for congenital tibia formation or failure. There are many specific types. Each type has its own pathology, disease course and prognosis. It is more common in the lower third of the humerus junction and eventually forms a local part. False joints. The incidence rate of males is slightly higher than that of females, mostly unilateral, and the ipsilateral tibia can also be involved. A small number of patients have a genetic history. Due to lumbar vertebrae or lumbar vertebrae, the low back pain is similar to that of osteoarthritis. The pain is aggravated after labor, and the rest can reduce the waist when moving in a certain direction.



The cause of congenital sacral pseudoarthrosis is not fully understood. Due to lumbar vertebrae or lumbar vertebrae, the low back pain is similar to that of osteoarthritis. The pain is aggravated after labor, the rest is relieved, and the waist can be aggravated when moving in a certain direction. When the pain occurs, the lumbosacral muscles are stiff and the lumbar vertebrae are not Scoliosis, pain does not radiate to the calf and so on.


an examination

Related inspection

Posterior tibial muscle strength test

After birth, a defect in the middle and lower part of the humerus was found, forming a pseudo joint. There is a hard fibrous tissue connection or cartilage connection at the pseudo joint. The bone end becomes thinner with the growth and development, atrophy, and the distal end is more pronounced with a pen tip and the cortex is thin. Sometimes the surrounding soft tissue also shrinks, including the gastrocnemius. The same changes occur if the tibia is involved. Check the imaging ct, B-ultrasound, check blood routine, blood sedimentation, blood and so on.


Differential diagnosis

Differential diagnosis of humeral pseudoarticular formation:

1. Fracture nonunion: traumatic tibial fractures in children, malformation can occur, and fracture nonunion is extremely rare. Even if there is no healing, there will be a large amount of callus formation in the fracture.

2. Brittle bone disease: The disease is a systemic disease with multiple fracture history. Although it is easy to fracture and repair and is barrier-free, in addition to the disease, there are special symptoms such as blue sclera, hearing impairment, early appearance of secondary sexual characteristics and family genetic history.

3. Rickets: The long bones of the extremities have changes, and the lower extremities are mostly bilateral due to the weight-bearing knee varus deformity. The X-ray showed a broadening of the metaphysis, a widening of the sacral line, and a typical cup-like change. The cure for rickets can leave the varus deformity. X-ray showed thickening of the backbone and thickening of the medial cortex of the medial tibia. However, there is no obvious osteosclerosis and the medullary cavity is unobstructed.

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