Most studies agree that the fate of femoral head osteonecrosis is associated with the size and location of the necrotic lesion. We present a volumetric method for assessment of osteonecrosis, based on magnetic resonance imaging. The method evaluates the percentage of the necrotic volume in the femoral head and in each of the head segments (octants). Along with the method, we present a classific...

Osteonecrosis of the femoral head is an uncommon complication following hip arthroscopy, generally due to an excessive traction of the limb and high intracapsular pressures of the hip. This complication entails catastrophic outcomes for the femoral head with collapse and degeneration, resulting in another surgical procedure. We present a case of a 21 year-old soccer player that underwent arthro...

Osteonecrosis of the femoral head can be caused by a variety of disorders and affects the relatively young patient. Most studies have concentrated on the femoral changes; the sites of early lesions of the labrum and acetabular cartilage have not been recorded. We studied 17 hips with osteonecrosis and a wide congruent joint space on radiographs and by direct inspection of the femoral head, labr...

We describe injuries to the posterior root of the medial meniscus in patients with spontaneous osteonecrosis of the medial compartment of the knee. We identified 30 consecutive patients with spontaneous osteonecrosis of the medial femoral condyle. The radiographs and MR imaging were reviewed. We found tears of the posterior root of the medial meniscus in 24 patients (80%). Of these, 15 were com...

Osteonecrosis of the jaw (ONJ) is commonly described as an adverse effect of the use of bisphosphonates. A few cases of ONJ associated with tyrosine kinase inhibitors (sunitinib, imatinib) have been reported in the literature and usually they occurred in patients simultaneously treated with bisphosphonates. We report an atypical case of ONJ related only to imatinib. A 72-year-old male patient w...

We tested the accuracy of MRI for the precise quantification of the volume of osteonecrosis in 30 hips (stage III). The values were compared with direct anatomical measurements of the femoral heads obtained after total hip replacement. When the area of osteonecrosis was determined visually, and manually outlined on each slice, the accuracy of the measurement of volume was satisfactory, and the ...

We report that adrenocorticotropic hormone (ACTH) protects against osteonecrosis of the femoral head induced by depot methylprednisolone acetate (depomedrol). This therapeutic response likely arises from enhanced osteoblastic support and the stimulation of VEGF by ACTH; the latter is largely responsible for maintaining the fine vascular network that surrounds highly remodeling bone. We suggest ...

Symptomatic osteonecrosis occurred in 8 out of 68 patients with systemic lupus erythematosus. Multiple joints were involved in 3 patients, and weight-bearing joints were most frequently affected. Osteonecrosis tended to occur early in the disease, and the patients had all received corticosteroids. Symptoms tended to occur when the disease had progressed from an active phase into one of clinical...

Over the past 4 years, numerous cases of osteonecrosis of the jaw in patients treated with bisphosphonates have been reported. Since 1998, children and adolescents with osteogenesis imperfecta have received bisphosphonates to increase their bone density and reduce the incidence of bone fractures. The results have been convincing, but recent reports of osteonecrosis of the jaw have caused great ...

BACKGROUND Bisphosphonates (BPs) and other antiresorptive agents such as denosumab are widely prescribed for the treatment of osteoporosis and are also used in patients with multiple myeloma and metastatic breast or prostate cancer for avoiding bone reabsorption and fractures that result in increased morbidity-mortality among such individuals. MATERIAL AND METHODS We made a bibliographic sear...