[Magnetic resonance angiography of stents].

Purpose: To understand the behavior of stents during contrast-enhanced magnetic resonance angiography (MRA).

Materials And Methods: Seven different types of stents are explored in vitro with spin echo (SE) T2 sequence and MRA sequences using classification of the intra-prothesis signal. Six patients with 11 different proximal stents are studied by Gadolinium enhanced MRA with the same classification.

[Study of atheromatous stenoses of carotid bifurcations by Doppler ultrasound, spiral angio-MRI, magnetic resonance angiography and comparison with arteriography].

Purpose: To evaluate Doppler ultrasound (US), Helical CT, Magnetic Resonance (MR) angiography in the detection of carotid bifurcation atherosclerotic disease and comparison with angiography.

Materials And Methods: After a Doppler US procedure, 56 carotid bifurcations were included (symptomatic stenosis greater than 60% or asymptomatic stenosis greater than 30%). Helical CT, MR angiography and selective arteriography were performed.

[The development of public health education: the Mauritius experience].

A public course has been initiated in 1990 in Mauritius for covering the national growing needs of public health specialists. This training course was organized jointly by the Ministry of Health, the University of Bordeaux II and the French Cooperation. After 3 sessions dedicated specifically to the Mauritian physicians, the course has been re-designed for the needs of the other countries of the region.

[Peritoneal mesothelioma. Contribution of MRI. Apropos of a case].

Peritoneal invasion by a malignant mesothelioma is less frequently encountered than pleural localization. We report a case of a double pleural and peritoneal localization. CT and MR may be suggestive, especially when pulmonary asbestosis is associated, but pathology (fine needle aspiration or surgical biopsy) is necessary to assess the diagnosis.

[Malignant adrenocortical carcinoma with atypical aspect. Value of tomodensitometry and magnetic resonance imaging. Apropos of a case].

A case of large and non-functioning malignant adrenal tumor is reported. It was discovered incidentally during a check-up ordered because of sciatic pain caused by an osteolytic lesion of the sacrum. This huge abdominal tumor was suspected to be an adrenal tumor one the basis of the CT and MR findings.

[Aneurysmal cyst of uncommon site. Apropos of a case. Contribution of MRI].

An aneurysmal bone cyst of fourth metacarpal which occurred in a 7-year-old girl was explored by MRI. MRI findings such as fluid-fluid levels were compared to literature. These levels are inconstant and not pathognomonic of aneurysmal bone cyst.

[Gallbladder duplication. Apropos of a case of echographic finding].

Duplication of the gallbladder is a rare congenital anomaly, which must be depicted by sonography, although false positive and negative diagnosis could still be made. Usually abdominal sonography allows duplication diagnosis as reported in our case and a cholecystography may be performed to determine the type of the anomaly. When a surgical procedure needs to be performed, especially in case of coelioscopic technique, surgeon needs to know the exact anatomic type of the anomaly and the number of gallbladders he will find.

[Spontaneous rupture of the rectum. Contribution of CT scan. Apropos of a case].

We report a case of spontaneous rupture of the rectosigmoid junction demonstrated by surgical and histological examination. This rare complication of chronic constipation is difficult to confirm except in the case of the typical clinical presentation with lower abdominal pain after defaecation and evisceration of small intestine loops through the anus. No radiological procedure is usually performed except for plain abdominal radiograph, to demonstrate inconstant (retro)peritoneal emphysema.

[Intrarenal migration of two fractured struts of a vena cava filter].

Filter complications are quite common. The most frequent are distal or proximal migration, angulation, vena cava thrombosis or perforation. We report one case of filter struts fracture and their migration in the right kidney.

[A survey of the prevalence of leprosy in 5 countries in central Africa].

The authors report the results of national surveys conducted in 5 Central Africa states: Cameroon, Congo, Gabon, Equatorial Guinea and RCA. The method used was cluster sampling among random populations. Only adults (greater than 15 years of age) took part in the study.

[Thoracic extramedullary hematopoiesis. Apropos of a case].

Extramedullary haematopoiesis is a compensatory response of bone marrow to abnormal haematopoietic tissue formation: the commonest etiology is thalassemia (generally intermedia). The thorax is a rare site and the posterior mediastinum is usually involved. CT scan completes standard chest radiology and allows fine needle aspiration to provide adequate cytologic material for the diagnosis of extramedullary haematopoiesis, especially when an intercurrent pathology is present and could involve paravertebral areas.

[Obstruction of pulmonary arteries. Contribution of the scanner and MRI. Apropos of 10 cases].

We present a retrospective study of ten patients presenting non specific clinical manifestations in whom the diagnosis of pulmonary embolism was documented by CT scan and/or MRI. Results of CT scan and/or MRI were compared to DSA bi-selective pulmonary angiography findings. In a large number of cases, CT scan and MRI allowed the detection of the obstruction within the right and left pulmonary arteries (RPA and LPA).

[Perforation of a loop of the small intestine by a Kim-Ray Greenfield endocaval filter. Report of a case].

Kim-Ray filter complications are usually benign, such as angulation or slight migration. We report and compare with the literature one case of vena cava perforation associated with a small bowel lesion. The follow-up with regular abdominal plain X-rays allows detection of filter angulation, the first step before vena cava perforation.

[Rapidly developing benign teratoma of the mediastinum in the adult].

Benign mediastinal teratomas are rare entities, representing 8 to 18% of all mediastinal tumors. Two cases of benign teratomas with a rapid growth suggesting malignancy are reported. CT and MR allowed precise characterization of the multi-tissue composition of the tumor (various CT densities were noted corresponding to adipose, cystic, calcified and hemorrhagic components), and definition of the extension of the process before surgical removal.

[Sampling surveys: an objective method of evaluating the prevalence of leprosy in an endemic zone].

The authors submit a simplified sample survey methodology designed to evaluate prevalence rates of leprosy. The system proposed uses a cluster sampling technique. A cluster is a randomly selected group of households.