Loosening of a Total Hip Arthroplasty Associated with a Periprosthetic Femoral Fracture Caused by Recurrent Hydatidosis of the Hip: A Case Report.

Case: A 35-year-old woman, who lived in an endemic area for echinococcosis, developed a periprosthetic fracture with loosening of a total hip arthroplasty that had been performed 9 years earlier for hydatidosis of the right proximal femur with a pathological femoral neck fracture. At that time, the patient did not have any signs of liver or lung involvement. She was successfully managed by a cemented revision hip arthroplasty without any signs of recurrence at the last follow-up of 5 years.

[Chondroblastoma of bone ].

Background: Chondroblastoma is a rare and benign cartilaginous tumor of bone often localized in the epiphysis of long bones and affecting young persons between 10 and 20 years.

Aim: To study the epidemiological, clinical and radiological aspects of bone chondroblastoma, to assess the outcome of chirurgical treatment and factors associated with recurrence.

Methods: It's a retrospective study, concerning 13 patients with chondroblastoma of bone, attending the orthopedic department of Sahloul hospital between 1991 and 2007.