Arthroplasty of the hip, for either arthritic changes or femoral neck fracture, is a common procedure in orthopedic surgery. Although the standard designs for implantation, either cemented or uncemented, are well described and studied, there are also alternative designs regarding the implantation of both prosthetic stem and cup. This paper aims to explore one such alternative design, using the screw-in technique. It has been described in past literature for uncemented fixation of both the cup and the stem, and the biomechanical principles of fixation are different from the classical methods, offering certain advantages that are insufficiently explored in current-day endoprosthesis. Also, we will be presenting an innovative femoral stem design, recently developed, that combines an uncemented screw-on technique with a cemented augmentation possibility, aimed to provide the practitioner with the advantages of a bone-preserving mini-stem design, combined with the innovative screw-in fixation technique and the versatility of the hybrid cemented/uncemented fixation method.

The uterine sarcoma is one of the type of neoplasm that affects the abdominopelvine organs. The behaviour of this hystopathological type of cellular line is very aggresive both to the primer organ and also to the nearby organs and to the main filter� organs like the liver and lung, where it develops metastasis. The treatment of this disease is multidisciplinary and it uses many therapeutic strategies depending on staging and the other comorbidities of the pacient. We will present the case of an 81 year old female known with the diagnosis of relapse tumoral abdominopelvin sarcoma developed one year after total hysterectomy surgery with bilateral anexetomie for the uterine sarcoma. Also we will discuss about a series of characteristics of the treatment plan observed at different similar cases. We will evaluate the latest drug lines used in oncology treatment, we will discuss about the therapeutic indications and in the end we will draw conclusions about the therapeutic indications of each case.

The use of osteosynthesis materials in orthopedics is fundamental in the surgical management of patients presenting with various pathologies of the locomotor system, in most cases trauma, but also malign and benign tumors. The risk that these materials could have in inducing malignant transformation of benign tumors or in the onset of primary malignant tumors, was rarely studied. On the one hand, primary malignant tumors of the locomotor system are much less frequent than other kind of neoplasms (for example Ewing sarcoma has an incidence of 1-3 cases / 1.000.000 people / year, ostosarcoma has an incidence of 2 cases / 1.000.000 people / year). On the other hand, usually there is a time window of several years, different from one case to another, from the moment of action of the etiopathogenic factor to the moment of revealing the presence of a neoplastic disease. Based on our clinical practice on a few clinical cases, we intend to study more thoroughly the etiology of primary bone malignant tumors in general and the role of the osteosynthesys materials in this matter especially.