[Bone involvement with osteolytic predominance in systemic mastocytosis. A clinical case].

Systemic mast cell disease is a rare condition, in which the frequent involvement of bones is likely to raise diagnostic problems. There are other concomitant visceral involvement as a rule. The skin lesions, if present and recognized, are suggestive.

[Post-traumatic osteolysis of the distal extremity of the clavicle].

Post-traumatic osteolysis of the acromial extremity of the clavicle is a rare condition, usually occurring sometime after an injury to the shoulder. Three cases of PTOAC and one case of athlete's osteolysis are reported. The semiology is summed up, as well as the differential diagnoses and the associated forms.

[Imaging techniques of the breast in 1991. 1].

Today, there is an increase in breast radiology practise. To realize good investigations with the lowest X ray dose absorbed, the authors accurate the technical specifications of each unit of the mammograph. They insist on the necessary quality control.

[Contribution of scanner in the diagnosis of intestinal infarction].

The clinical expression of arterial mesenteric infarction is not always acute and typical. In venous thrombosis, clinical signs of aggravation occur after a long development. So, clinical pictures of bowel infarction use not be suggestive.

[Mesenchymal extra-skeletal chondrosarcoma. Apropos of a case].

The authors report a case of extra-skeletal mesenchymal chondrosarcoma in a 22 year old man. This rare tumour developed along the nerve tracts (nerve roots, sciatic nerve and gluteal nerves) with contiguous involvement of muscles and three different bones (vertebra, sacrum, iliac bone). The nature of the tumour could only be determined by histological examination of a large fragment.

[Pyomyositis in AIDS. Apropos of a case].

Pyomyositis is a purulent infection of skeletal muscle, a rare entity in temperate climates. The disease has been rarely reported in patients with AIDS. Staphylococcus aureus is the predominant organism.

[Hemangiopericytoma. Apropos of a case].

Haemangiopericytomas are ubiquitous tumours with an equivocal clinical and radiological expression. They generally have a slow course and the lesions are usually revealed by a non-specific mass effect on adjacent structures. The authors report a case of subcutaneous haemangiopericytoma of the elbow which presented clinically as a vascular malformation.

[Sternocostoclavicular osteoarthritis].

On observation of a case of infectious osteoarthritis which was remarkable both because of its site, the sternoclavicular joint, and of the germ involved, which was Salmonella paratyphi A is reported.

[Arteriographic aspects of Buerger's disease. Apropos of 18 cases].

Arteriosclerosis obliterans occurring in a young man in an impressive clinical presentation which requires a precise diagnosis. There are no clinical, radiological, laboratory or histological signs of Buerger's disease. In arteriography, all of the suggestive negative and positive elements are important and must be well known as the diagnostic orientation large depends on recognition of their association.

[Value of x-ray computed tomography in osteoid osteoma].

Four cases of suspected osteoid osteoma were evaluated by computed tomography (CT). The authors relate the role of CT. As a key diagnostic tool: radionuclide imaging is helpful in directing subsequent CT scans, which allows the study of complex anatomical sites (spine) or the analysis of atypical lesions (invisible nidus, sclerosis or lytic lesions, double nidus.

[Renal hydatid cyst. Contribution of radiology apropos of a case].

Hydatid disease, an infestation of gastrointestinal origin, is essentially localized in the two principal filters of the body, the liver and the lung (80% of localizations); 20% correspond to a random distribution (brain, bones, kidneys, etc.). The observation of a new case of rare renal infestation (1 to 5% of all hydatid cysts) constitutes an occasion to review the role of various radiological investigations in this disease.

[Aneurysm of the celiac trunk. A review of the literature. Apropos of a new case].

Aneurysms of celiac trunk are rare (82 cases reported worldwide), and the clinical picture is usually little suggestive of the lesion, which may be totally asymptomatic. Positive diagnosis and determination of possible extension of the disease, as well as postoperative follow up is ensured by modern imaging techniques (ultrasound, CT scan, digital subtraction angiography). Etiology of the aneurysm varies but is generally atheromatous disease or intimal fibrodysplasia.