Biomedical subjects
Publications and source records attributed to B Hamzé.
Primary leiomyosarcoma of bone is a rarely reported tumor of elderly subjects. It usually shows an aggressive osteolytic pattern on plain radiographs and involves predominantly the metaphyses of long bones. We report a case of primary leiomyosarcoma of bone, which is atypical by its epiphyseal location, a non-aggressive pattern on plain radiographs and its MR imaging features.
We report a case of Hajdu-Cheney syndrome. This cranioskeletal dysplasia is characterized by band-like acro-osteolysis of the tufts middle thirds. Differential diagnosis of band-like acro-osteolysis are discussed.
The spinal vacuum phenomenon is a collection of gas within the disk space, the vertebral body, the apophyseal joint or the spinal canal. The intradiscal vacuum phenomenon is frequently observed in degenerative disk disease and crystal-induced diskopathy. This has obvious significance to the radiologist, who, on observing a narrowed disk space or collapsed vertebral body, might otherwise consider infectious or neoplastic spondylitis, a likely possibility. The presence of vacuum phenomenon militates against the diagnosis of infection or tumor.
Unilateral spondylolytic spondylolisthesis may cause lateral tilt of the overlying spinous processes towards the normal isthmus on PA views. Bilateral spondylolytic spondylolisthesis is generally located at the L5-S1 level. The vertebral shift is usually moderate. Instability at the level of spondylolisthesis may be demonstrated by stress lateral views but is uneasy to quantify. In case of sciatica associated to spondylolisthesis, foraminal stenosis is probably the most frequent cause but foraminal compression of the spinal ganglion is difficult to assess on imaging.
26-Gauge fine needle for lumbar puncture allows lower rate and intensity of post lumbar puncture syndrome. This technique drammatically decreases discomfort in patients who undergo myelography and helps in keeping this imaging modality indicated when necessary.
Lumbar foraminal injection under fluoroscopic guidance is indicated either for a diagnostic purpose to determine which nerve root is painful or for a selective steroid injection. Lumbar foraminal approach is based on that of the posterolateral extradural diskography. Selective puncture of the first sacral foramen under fluoroscopic guidance may be indicated for the treatment of sacral symptomatic meningeal cysts, a very unfrequent lesion.
This is a review article on fibrous dysplasia of bone. All aspects of this condition including, macroscopic and histologic findings, lesion distribution, clinical, radiological and biological findings as well as evolution and treatment are discussed. A classification of skeletal lesions based on then appearance on plains films and computed tomography is proposed; 3 radiological types are differentiated: non-expanding bone lesions, expanding lesions with a thick periosteal reaction and expanding lesions with a thin periosteal shell. Main features of osteofibrous dysplasia are also discussed.
There are two types of labrum acetabulare lesions. The first, posterior in the labrum, must be evocated when hip pain occurs secondary after slight traumatisms. The second, much more frequent, superior in the labrum, is responsible for important hip pain contrasting with slight X-ray abnormalities of the pelvis, except for frequent acetabular dysplasia. Not only arthrography, but also coronal arthro-tomography and CT-arthrography are necessary for the diagnosis of labrum acetabulare lesions.
Knee puncture for arthrography via a lateral parapatellar approach is described. Direct puncture of the femorotibial space, via a ventral approach, is more painful and should only be used when the lateral parapatellar route is not possible, namely in case of complete suprapatellar plica.