[Chosen aspects of the surgical procedure during shoulder arthroplasty].

Chosen aspects of the surgical-technique during shoulder arthroplasty were presented. In the description the most important stages of the implantation of shoulder prosthesis were taken into account. The necessity of the warnings during the surgical procedure of basic aspects of the anatomy and rules of shoulder biomechanics was pointed out.

[Imitation of metastatic lesions in patients with brown tumor].

The authors have presented two cases of hyperparathyroidism in male patients at the age of 52 and 77 years in whom radiological findings imitated osteolytic, metastatic bone lesions. It has been emphasised that the difficulties with proper diagnosis of brown tumor often occur and the final diagnosis is based on the exact pathology test. In patients with pathological fracture resection with margins and intramedullary fixation, as well as total hip replacement were performed.

[Neurological complication after total hip replacement].

The study was performed to evaluate neurological complication of 562 patients who had undergone primary total hip replacement. Lesions of sciatic, femoral and common peroneal nerve occurred in 18 patients (3.2%).