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M Coulomb

Publications and source records attributed to M Coulomb.

At least 73 records · Page 4Linked to original sources
PubMed1990

[Benign pleural fibroma. An anatomo-clinical study of 10 cases].

We present an anatomical-clinical analysis of ten cases of benign pleural fibroma. This tumour was discovered in a systematic fashion in 8 of the 10 cases and fortuitously in one. Recent radiological examinations enabled the diagnosis to be suspected. Computerised tomography most often precisely identified the pleural topography and imagery by nuclear magnetic resonance in one case visualised fibrous tissue (with a zone of low signals on the scale in T2). The final diagnosis was achieved at the same time as the treatment when an exploratory thoracotomy was performed. In all the cases there was a tumour composed of fusiform cells covered by normal epithelium coming from the viscera pleura 8 times out of 10. The ultrastructure examination and immunohistochemistry of the fusiform cells (Vimentin plus, EMA-, KL1-) allowed for a differentiation of these tumours of connective tissue origin from tumours of mesothelial origin. These analyses constitute an argument in favour of the fibroblastic origin of pleural fibromas.

Adult↗
PubMed1990

[Bronchiolitis obliterans with idiopathic organized pneumonia. Anatomoclinical analysis and nosologic discussion apropos of 6 cases].

The clinical, radiological, physiological and pathological features were studied in 6 cases of idiopathic bronchiolitis obliterans organized pneumonia (BOOP). Patients characteristically had a history of exertional dyspnea, cough, fever, weight loss, bilateral radiographic shadowing, elevated ESR and hypoxemia. Corticosteroids were effective; however, one patient died of cytomegalovirus pneumonia. The pathological features, distinguished by the presence of granulation tissue plugs extending from bronchioles into alveolar ducts and alveoli, are described in detail. The place of BOOP within the broad spectrum of bronchiolitis obliterans between small airways disease and usual interstitial pneumonia is discussed.

Aged↗
PubMed1989

[Detection of parietal lesions using magnetic resonance imaging in arrhythmogenic dysplasia of the right ventricle].

Seven patients with arrhythmogenic right ventricular dysplasia were explored by magnetic resonance imaging (MRI), using the spin-echo technique (TR = the patient's own RR cycle; TE = 28 ms, 56 ms, 84 ms) with multiple, contiguous, 7 to 10 mm thick sections performed in two planes: axial plus sagittal or frontal planes. In 5 out of 7 patients, MRI showed dysplastic lesions in the right ventricular wall presenting typically as fat-like high signals contrasting with the normal myocardium. In 2 patients, no lesion was clearly visualized. The parietal lesions were located in the anterior wall of the right ventricle and conus arteriosus in 5 cases and in the lower wall of the right ventricle in one patient who had two dysplastic areas. In 3 patients the lesions extended up to the tip of the interventricular septum and of the left ventricle. In the 2 patients whose lesions were most extensive, their predominance in the subepicardial region and the concordance between the sites of abnormalities at MRI and angiography were clearly observed. Thus, despite its present technical limitations MRI seems to be one of the first techniques capable of visualizing the parietal lesions in patients with arrhythmogenic right ventricular dysplasia.

Adult↗
PubMed1989

[Magnetic resonance imaging in studying injuries of the ligaments and menisci of the knee. 85 cases controlled by arthroscopy].

The authors report a prospective study of eighty-five patients with suspected meniscal or ligament lesions examined using Magnetic Resonance Imaging (MRI). In all cases, the results were compared with the findings at arthroscopy. The technique seems to be a good non-invasive diagnostic procedure, whose accuracy is 87 p. cent for the medial meniscus, 95 p. cent for the lateral meniscus and 100 p. cent for the anterior cruciate ligament (ACL). The most interesting indications at the present time are in the diagnosis of meniscal lesions, the evaluation of the menisci in chronic cruciate ligaments insufficiency, and the diagnosis of acute tears of the ACL (especially when examination is limited by pain or muscle spasm). In the future, MRI should take the place of arthrography. The total scanning time is rather short, as most lesions are detected by T1 weighted sagittal images.

Adolescent↗
PubMed1989

[MRI features of expansive processes of soft tissues. Contribution to etiologic diagnosis. Apropos of 32 cases].

This study concerns the investigation of 32 soft-tissue tumors by MRI, subsequently verified by biopsies or surgery (n = 28) or other investigations (n = 4). MRI can suggest the diagnosis in some cases: lipomas cysts, hematomas, neuromas, desmoid tumors, hemangiomas, by contrast analysis and morphologic aspects; sometimes, malignant lesions are suspected on particular anatomic criteria. MRI is excellent in the evaluation of local extension. MRI can therefore be performed when the staging of soft tissue tumor is incompletely provided by other investigations (CT or US).

Adolescent↗
PubMed1988

[Magnetic resonance imaging in menisco-ligamentous lesions. Comparison with arthroscopy. Apropos of 37 cases].

Results of magnetic resonance imaging of 37 cases of lesions of meniscus and ligaments of knee are reported and compared with arthroscopy findings. Use of MRI appears to be an excellent non-invasive diagnostic method, with current major indications in acute knee injuries and for evaluation of chronic laxity. It also allows guidance of surgical procedures. In the future, MRI should replace the more aggressive arthrography, this with a relatively short examination time, since sagittal section imaging in TI permits detection of the majority of lesions.

Acute Disease↗
PubMed1987

The mediastinum in sagittal sectioning. Anatomy and magnetic resonance imaging (MRI).

Ten volunteers with a normal mediastinum were investigated by magnetic resonance using a 0.5 Tesla CGR imager with a supraconducting magnet. The reconstruction matrix consisted of a 256 X 256 grating for a field of the order of 420 mm, with a spatial resolution of 1.6 X 1.6 mm2. The sections, balanced in T1, were performed in synchronization with the ECG. The successive sagittal sections were correlated with sagittal sections made on a single embalmed frozen subject. The MRI and anatomic sections were made at 5 mm intervals and located in relation to the median sagittal plane of the mediastinum. Examples of structural variations, malformations or tumours studied in sagittal sections, and taken from investigation of over 170 patients, demonstrate the importance of this investigational technique.

Electrocardiography↗
PubMed1987

Mediastinal chondrohamartoma.

Chondromatous hamartomas of the lung are usually intraparenchymal and are rarely located in the bronchial lumen. Mediastinal chondrohamartomas are rare. A case is reported in which the close relationship with the esophagus suggests that this tumor is a choristoma rather than a hamartoma. To our knowledge, such a theory has not been previously proposed.

Adolescent↗
PubMed1987

[Magnetic resonance imaging in dissection of the aorta].

In order to evaluate the usefulness of this new exploratory method in dissection of the aorta, 13 patients (10 men and 3 women, mean age 58 +/- 14 years) were examined by means of an 0.5 Tesla Magniscan 5000 nuclear magnetic resonance machine. Fifteen examinations were performed: 5 in patients with actual aortic dissection (type A 4 including one acute, type B1), 5 in patients previously operated upon for type A dissection and 5 for suspected acute aortic dissection unconfirmed by other examinations. Magnetic resonance imaging (MRI), synchronized with electrocardiography, was carried out using spin-echo techniques with 1 to 3 echoes and multiple contiguous sections along several planes. In the 5 patients with actual dissection the 2 channels separating the membrane could be demonstrated, thus providing a firm diagnosis (MRI proved superior to angiography in 2/5 patients). All 5 patients could be classified as either type A or type B. Extension to the cervical vessels was observed in 3 cases and the portal of entry was seen in one case, but the origin of the coronary arteries was never visualized. In the 5 patients previously operated upon MRI provided detailed analysis of the prosthesis of the supra-coronary ascending aorta implanted in all cases, of the aorta proximal and distal to that segment and of the periaortic mediastinum. By studying the signal from the false channel distal to the prosthesis information was obtained as to the presence in it (2 patients) or absence of circulating blood.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1987

[Value of magnetic resonance imaging in a lipoma of the left ventricle].

A patient with benign left ventricular lipoma was explored pre- and post-operatively with echocardiography, computerized tomography (CT) and magnetic resonance imaging (MRI). With MRI spin-echo sequences the lipoma emitted a bright signal similar to that of normal fatty tissue on the two echoes of the sequence (28 ms and 65 ms). MRI was not better than CT to demonstrate that the tumour was a lipoma, but it proved to be the best technique to obtain information on tumoral spread to the myocardium and pericardium, and it showed the intracavitary extension without the need for contrast medium injection. After surgery, MRI displayed the remains of a septal lipomatous lesion. This case underlines the usefulness of MRI for the evaluation of cardiac tumours, and particularly lipomas.

Echocardiography↗
PubMed1987

[Comparative study of magnetic resonance imaging and tomodensitometry in the diagnosis of locoregional extension in 61 patients with bronchial cancers].

In order to assess the value of nuclear magnetic imagery NMR in the diagnosis of the extent of bronchial cancers, 61 patients with operable bronchial carcinoma had both a CT scan and an NMR scan pre-operatively. Fifty one mediastinoscopies were performed. Twelve times there were mediastinal glandular enlargement. Ten times the thoracotomy was performed straight away. After pathological studies of the biopsy, 24 patients were N2, 25 N1, 12 N0; the sensibility of NMR to foresee lymph node invasions was 83% (specificity 70%), for CT scanning 75% (specificity 81%). Thirteen patients presented with a direct mediastinal or parietal invasion. The sensibility of detecting these invasions was only 38% for NMR (specificity 94.5%) and for CT scanning 54% (specificity 94.5%). There is little difference in the results and no statistical difference. This leads us to conclude that at present, NMR does not give more information than TDM in the diagnosis of operability in bronchial cancers.

Bronchial Neoplasms↗
PubMed1987

[Straight azygos continuation of the inferior vena cava. Apropos of 3 cases using an NMR study].

Three patients with straight azygos vein continuation of inferior vena cava (IVC) were studied by nuclear magnetic resonance (NMR) imaging. In all three cases the diagnosis had been established previously by ultrasound and/or computed tomography imaging, but NMR images provided better anatomical precision of the venous anomaly : visualization of the total trajectory of the major azygos vein, the caliber of which can exceed that of aorta, and absence of retrohepatic segment of IVC but presence of a short supradiaphragmatic segment towards which converge the suprahepatic veins; anastomotic etwork between IVC and major azygos vein contributing to ensure continuity of venous drainage superior to its renal segment. The advantages of NMR are described and the precise diagnostic role of this new method of imaging in the diagnosis of this type of anomaly discussed.

Adult↗
PubMed1987

[MRI and tumors of the mediastinum. Correlation with CT x-ray].

This correlative study concerns the investigation of 22 mediastinal tumors by MRI and CT, subsequently verified by biopsies or surgery. It allows us to better define the technical aspects in the realization of MRI, including an assessment of the use of ECG gating. It also permits an appreciation of the respective performances of these 2 imaging methods: there is a good correlation between the two technics for both the positive and etiologic diagnosis of mediastinal tumors: in etiologic diagnosis, the same limitations were encountered with the two technics. However, MRI offers some advantages in the evaluation of tumoral extension. So, we suggest once a mediastinal mass has been shown using plain films, when available, MRI alone should be performed.

Adult↗