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Biomedical subjects

V Servois

Publications and source records attributed to V Servois.

27 records · Page 2Linked to original sources
PubMed1993

[Color echo-doppler of the ureterovesical stream. Normal aspects. Application to the acute ureteral obstruction].

A colour Doppler ultrasound study of the ureterovesical was performed to define the normal features, variants and abnormalities of the ureteric stream by comparing 50 normal subjects and 19 subjects with renal colic due to ureteric stones. The examination included assessment of the frequency, intensity, morphology and symmetry of the ureterovesical stream. In normal subjects, the stream was either absent, especially in the case of fluid restriction (36%), present and symmetrical (34%) or asymmetrical (30%). In patients with ureteric stones, during a non-painful period and in the absence of obstruction on IVU, the stream was normal and symmetrical (9%) while during a painful period with obstruction on IVU, the ureteric stream was either absent (47%) or abnormal and asymmetrical (31%). A continuous stream, very suggestive of obstruction, was observed in 5 cases. Colour Doppler ultrasound is a new, simple method which may be helpful in the diagnosis of renal colic, particularly in cases in which the pyelocaliceal cavities are not dilated.

Acute Disease↗
PubMedDate not supplied

Two-dimensional time-of-flight magnetic resonance angiography of renal arteries without maximum intensity projection: a prospective comparison with angiography in 21 patients screened for renovascular hypertension.

PURPOSE: We compared magnetic resonance angiography (MRA) with conventional angiography to establish its value as a screening test in the workup for renal hypertension. METHODS: Twenty-one patients underwent MRA and angiography within a three-day interval. Fifteen patients were suspected of having renovascular hypertension on the basis of clinical findings; the remaining six had multivessel atherosclerosis with renal insufficiency. MRA was performed on a 1 Tesla magnet in three planes: axial, coronal and perpendicular to the axis of each renal artery, by means of several contiguous or overlapping individual slice acquisitions. The two examinations were read by the same two independent observers, before and after an interval of 3 months. RESULTS: Conventional angiography showed 48 renal arteries. All main and three of six accessory renal arteries were correctly identified by MRA, as well as 11 of 14 significant stenoses or thromboses. Overreading of stenoses by MRA was observed in 4 cases. There were two false negatives for the two readers. The sensitivity and specificity of MRA for the detection of stenoses of the main renal arteries were found to be 70 and 78% respectively, for the first reading and 85 and 86% for the second reading. CONCLUSION: MRA is considered a useful noninvasive method to determine the need for conventional angiography in patients in whom renal artery stenosis is suspected.

Adult↗
PubMedDate not supplied

[Prostatic brachytherapy: an alternative therapy. Review of the literature] .

Radical prostatectomy remains the 'golden standard' therapy for localized prostate carcinoma for patients with a survival rate of more than ten years. However, because of the complications inherent in this surgical procedure, prostatectomy is presently increasingly challenged by various radiotherapy procedures. In the last decade, more sophisticated conformal therapy techniques have been proposed for prostate cancer patients. In parallel, for highly selected patients, brachytherapy is being promoted by an increasing number of medical centers. In fact, brachytherapy techniques for prostate cancers can be traced back to 1911, but recently developed techniques offer reliability and reproducibility, with satisfactory results in terms of tumor control and reduced toxicity, in selected patients. We present here the different techniques that are available today in prostate cancer brachytherapy.

Brachytherapy↗
PubMedDate not supplied

Intraabdominal desmoplastic small round cell tumor: report of a case with fine needle aspiration, cytologic diagnosis and molecular confirmation.

BACKGROUND: Desmoplastic small round cell tumor (DSRCT) is a recently described neoplasm. This entity is well defined, with distinct clinical, pathologic and immunohistochemical features. Molecular studies have shown a specific reciprocal translocation t(11;22)(p13;q12). To our knowledge, no report of DSRCT with molecular confirmation on cytologic material has been reported before. CASE: Fine needle aspiration (FNA) was performed on an intraabdominal mass in a 37-year-old man. A May-Grunwald-Giemsa-stained preparation showed clusters of small round tumor cells associated with desmoplastic stromal cells, highly suggestive of DSRCT. FNA of a supraclavicular node showed cytologic features similar to those of the primary abdominal mass, including a prominent desmoplastic reaction of the stroma. Immunocytochemical studies showed myogenic and epithelial differentiation. Molecular analysis was performed on FNA, revealing the EWS/ WT1 chimeric transcript and thus confirming the cytologic diagnosis. CONCLUSION: Cytomorphologically, a definitive diagnosis of DSRCT may be difficult, as this tumor bears considerable resemblance to other small round cell tumors. The diagnosis can be confirmed by ancillary techniques, such as immunocytochemistry, and particularly by molecular analysis, which may also be performed on cytologic material.

Abdominal Neoplasms↗
PubMedDate not supplied

[Liver tumors around the vena cava. Strategy for surgical approach of segments I and IX].

The technical problems raised by the delicate surgery of tumours of the liver developing around the vena cava, with and without invasion of segments I and IX was studied on the basis of 7 cases reports. The intra- or extra-hepatic pedicule route, the denudation of the entire retrohepatic vena cava, and the clamping needed for exsanguinous surgery are presented together with future perspectives including 3-D liver imaging, stimulation of liver regeneration potential and ex-vivo techniques are discussed with the aim of more and more carcinological liver surgery.

Aged↗
PubMedDate not supplied

[Therapeutic strategy for large cervical, mediastinal metastatic mature teratomas and large retro- and intraperitoneal lesions].

A 27 years old man was treated after surgery and classic chemotherapy for a right testicular teratoma (stage IV). Two months after the end of chemotherapy the patient developed "a Growing Teratoma Syndrome" with left subclavian and mediastinal nodes enlargement and bulky abdominal cystic masses with vena cava compression, collateral circulation and oedema of inferior members. Four debulking surgical approaches: cervical, thoracic and abdominal were performed and permitted complete functional recovery.

Adult↗
PubMedDate not supplied

[Application of three-dimensional computer graphics in oncology].

Accurate 3D tumoral volume evaluation is now possible through the combined use and progress of computer graphics technics (3D reconstruction and visualization) and medical imagery (helicoidal TDM scanner). Specific organ and pathology oriented softwares can help answer rapidly to problems posed by oncologic praticians. A new decision support for diagnosis, therapy and follow-up is emerging. First results in liver tumors and hepatic regeneration macroscopic biometrics are presented. Tumoral or organ volumic index will be usable in the follow-up. TNM staging, external conformal radiotherapy for prostatic or brain tumors, drugs cytolytic effects evaluation will take great advantage of these technologies. 3D visualization and matching CT and MRI imagery can help computed assisted surgery.

Computer Graphics↗