The aim of this work was to assess the preliminary anatomical and functional results of patients to establish prospects. Materials and method: We report here the preliminary results of a retrospective mono-centric, homogeneous and continuous series, of 21 non-cemented total hip implants, implanted from January 2011 to December 2014. The mean follow-up time was 24 months. The patients were evaluated by Harris's hip at the last follow-up. Results: The mean age of the intervention was 30 years. In our series, we observed a male predominance (60% of cases). Clinically, the Harris score varied significantly from 52.6 ± 11.4 pre-operatively to 85.1 ± 5.1 during the last follow-up visit. Among the items in the score, pain was the parameter that showed the greatest improvement. Thigh pain was observed in only one patient operated on the two sides. At the level of radiology, the femoral implant showed great stability. Bone resorption was suspected in 14 cases (66.66%), and confirmed in 4 cases (19.04%) with excellent bone remodeling, illustrated by the Engh and Massin scores. A loosening and a prosthetic dislocation was observed in a patient (4.76%). Any heterotopic ossification was observed. Conclusion: Our study confirmed good clinical and radiological results of the non-cemented hip prosthesis series in young patients. The rates of aseptic loosening, acetabular edges or osteolysis are low and stable over time.

Soft alveolar sarcoma is a rare tumor (0.5% to 1% of soft-tissue sarcomas) of poor prognosis that often affects the young subject, with a moderate male predominance. The authors present the diagnostic and therapeutic course of a 60-year-old patient from Niger with no particular previous history, consulted for a painless swelling of the right arm evolving for 6 months, in which the diagnosis of alveolar sarcoma of the soft parts of the arm was selected. A monobloc surgical excision decision was made, with the anatomy and function of the limb retained, with the filling of the area resected with cement and fixed by a locked nail. A conventional three-course chemotherapy regimen was instituted. Alveolar sarcoma of the soft tissues is a rare tumor whose imagery remains unclear, but the diagnosis is based on surgical excision with histopathological examination and immunohistochemical analysis.