Dorsomedial fracture dislocation of the tarsal navicular: A rare orthopaedic injury.

Dorsomedial fracture dislocations of the tarsal navicular are extremely rare injuries which commonly occur secondary to high energy, complex multidirectional forces involving an abduction force to a pronated and plantar-flexed foot. A 44-year-old female presented in the emergency room following a motor vehicle accident with a dorsomedial fracture dislocation of her navicular. Management required acute fusion of the talonavicular joint.

The popularity of outcome measures used in shoulder arthroplasty literature.

Introduction: Patient-reported outcomes (PROs) are frequently utilized within orthopaedics to determine the extent of patient disease and the efficacy of surgical treatments. Shoulder arthroplasty is a common treatment option for a range of pathologies; however, substantial variety exists regarding the instruments used within the published literature, limiting their quality and generalizability. The purpose of the present systematic review is to evaluate the overall number and frequency of outcome measures used in all clinical studies evaluating outcomes following shoulder arthroplasty.

Propeptide of human protein C is necessary for gamma-carboxylation.

Protein C is one of a family of vitamin K dependent proteins, including blood coagulation factors and bone proteins, that contains gamma-carboxyglutamic acid. Sequence analysis of the cDNAs for these proteins has revealed the presence of a prepro leader sequence that contains a pre sequence or hydrophobic signal sequence and a propeptide containing a number of highly conserved amino acids. The pre region is removed from the growing polypeptide chain by signal peptidase, while the pro region is subsequently removed from the protein prior to secretion.

Hemophilia B (factor IXSeattle 2) due to a single nucleotide deletion in the gene for factor IX.

To understand the molecular basis for hemophilia B in patients with little or no circulating Factor IX antigen, a patient who had less than 0.2% circulating Factor IX antigen (Factor IXSeattle 2) was selected for analysis of his Factor IX gene. Genomic DNA fragments from the abnormal gene were cloned into bacteriophage lambda vectors and recombinant phage were identified using radiolabeled genomic probes obtained from the normal Factor IX gene.

Nucleotide sequence of the gene for human factor IX (antihemophilic factor B).

Two different human genomic DNA libraries were screened for the gene for blood coagulation factor IX by employing a cDNA for the human protein as a hybridization probe. Five overlapping lambda phages were identified that contained the gene for factor IX. The complete DNA sequence of about 38 kilobases for the gene and the adjacent 5' and 3' flanking regions was established by the dideoxy chain termination and chemical degradation methods.