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H Degryse

Publications and source records attributed to H Degryse.

At least 19 recordsLinked to original sources
PubMed1995

Magnetic resonance arthrography of the scapulohumeral joint in dogs, using gadopentetate dimeglumine.

Six scapulohumeral joints (3 normal joints and 3 joints with radiographic evidence of osteochondrosis) underwent conventional magnetic resonance (MR) imaging and MR scapulohumeral arthrography to evaluate delineation of the articular cartilage. The MR arthrography was performed, using 5 ml of 500 microM gadopentetate dimeglumine (Gd-DTPA) as a contrast medium. Delineation of normal articular cartilage and cartilage defects was less accurate after intra-articular administration of Gd-DTPA. Therefore, it was concluded that MR arthrography with Gd-DTPA is unrewarding for evaluation of osteochondrosis lesions.

Animals↗
PubMed1993

Pathologic correlations with magnetic resonance images of osteochondrosis lesions in canine shoulders.

Twelve shoulders in 6 dogs with clinical and radiographic evidence of osteochondrosis were examined by magnetic resonance imaging performed on a 0.5-T superconductive system. Scans were obtained with 5-mm-thick slices and 0.75-mm pixel size. Unenhanced T1-weighted spin-echo and unenhanced T2*-weighted gradient-echo images were obtained, using a high-resolution surface coil. The T1-weighted sequences were repeated after IV injection of 0.1 mmol of gadopentetate dimeglumine/kg of body weight (0.2 ml/kg). In 6 joints, histologic examination of synovia and articular cartilage was carried out. The magnetic resonance images were correlated with arthrographic, arthroscopic, and histologic findings. Magnetic resonance imaging was useful in evaluating the extent of subchondral lesions and the severity of inflammatory changes within the subchondral bone. Areas of low signal (visible subchondrally on T1-weighted images that were enhanced by administration of contrast medium) indicated active inflammatory changes within the subchondral bone. Although articular cartilage discontinuity could be detected, loose cartilage flaps could not always be reliably demonstrated. Signal inhomogeneity within the articular cartilage was presumed to correspond with zones of cartilage degeneration.

Animals↗
PubMed1993

Focal nodular hyperplasia of the liver: radiologic findings.

A retrospective analysis of the results of ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) of 24 cases (28 lesions) of proven focal nodular hyperplasia (FNH) is presented. While US exhibited nonspecific features, CT frequently showed characteristic features: hypodensity on precontrast scans (69%), transient immediate enhancement after bolus injection (96%), and homogeneity (85%). A scar was noted in 31% of the cases. The typical MR triad of isointensity on T1- and/or T2-weighted (T2-WI), homogeneity, and a scar which shows hyperintensity on T2-WI was seen in only 12% of our cases. The most common finding was homogeneity (94%). In two cases the scar was hypointense on T2-WI. To our knowledge, this finding has not been described before. We conclude that the features of FNH, although fairly constant, are at times indistinguishable from those of other hepatic tumors, such as hepatic adenoma (HA), fibrolamellar hepatocellular carcinoma (FLHCC), small hepatocellular carcinoma, and a hyperplastic nodule. Therefore, a multimodality approach is essential for the correct diagnosis in order to prevent unnecessary surgery.

Adult↗
PubMed1993

A double-blind fluoroscopic study of cisapride on gastrointestinal motility in patients with functional dyspepsia.

Twenty patients with functional dyspepsia were referred for radiologic examination and, upon confirmation of a hypomotile stomach, were given either 10 mg cisapride or placebo in a double-blind manner (10 patients per group). The movement of a 250-ml barium meal was assessed by means of television fluoroscopy performed at regular time intervals. Cisapride significantly improved antral contractility and enhanced gastric emptying compared with placebo. Deep peristaltic waves occurred over the entire small bowel, and motility and small-bowel transit time of the barium meal were significantly increased in the cisapride group compared with the placebo group. The study demonstrates that when a carefully defined protocol is observed, fluoroscopy following barium ingestion offers considerable potential in the assessment of gastrointestinal motility.

Barium Sulfate↗
PubMed1993

Steinert's disease.

Explore the source record for details and available documents.

Diagnosis, Differential↗
PubMed1992

Nerve sheath tumors: evaluation with CT and MR imaging.

Tumors of nerves are classified into benign (schwannoma and neurofibroma) and malignant nerve sheath tumors. Schwannomas almost always occur as solitary lesions, whereas neurofibromas may occur alone or in a greater number, especially in patients with the peripheral form of von Recklinghausen's disease. Benign nerve sheath tumors often present as asymptomatic, slowly growing soft tissue masses. Although malignant nerve sheath tumors are relatively rare, a sudden increase in the size of a lesion, in particular in a patient with neurofibromatosis, should raise the suspicion of malignant change. On computed tomography (CT) and magnetic resonance imaging (MR) a benign nerve sheath tumor usually appears as a well-defined, oval, spherical or fusiform mass with smooth borders and distinct outlines, located in the subcutaneous tissue or centered at the expected anatomic location of a nerve, with displacement of adjacent soft tissues. Generally nerve sheath tumors have a low density on unenhanced CT scans. On MR they are isointense to muscle on T1-weighted images, whereas on T2-weighted images the signal intensity is high. Both on CT and MR the degree of contrast enhancement is moderate to marked and may be homogeneous or inhomogeneous. MR has become the method of choice for evaluating the anatomic location, contour, and relation of a nerve sheath tumor to adjacent neural, vascular, and muscular structures. The imaging criteria for malignant nerve sheath tumors are not specific enough to distinguish them from other malignant soft tissue tumors, so that neither CT nor MR can establish a definite diagnosis.

Adolescent↗
PubMed1992

Imaging and differential diagnosis of synovial sarcoma.

Synovial sarcoma is an uncommon malignant tumor, most frequent in the lower extremity, predominantly in young males. The authors review the clinical history, the different radiographic manifestations and MR appearance of the entity. The MR findings cannot be considered specific for synovial sarcoma. A heterogeneous septated mass located close to a joint, a tendon or a bursa is most indicative of the tumor. The radiographic features of a soft tissue mass with associated calcifications and bony erosions in the lower extremity should suggest a synovial sarcoma. The most likely differential diagnoses are discussed.

Adult↗
PubMed1992

Vascular soft tissue tumors: medical imaging.

Histologically, tumors of the vascular system are divided into three categories. Benign types can be localized (hemangioma) or involve large segments of the body (angiomatosis). Vascular tumors of intermediate malignancy are known as hemangioendotheliomas. Angiosarcoma is one of the rarest malignant soft tissue neoplasms. The authors present the morphological and SI features of 17 histologically proven vascular tumors (16 benign, 1 malignant) examined by MRI. The results are compared with the findings on other imaging techniques. On T1-WI, the tumors are slightly hyperintense to muscle with interspersed areas of low SI corresponding to fibrous septa, calcifications, or fastly flowing blood, and areas of SI equal to fat. On T2-WI, the lesions are more homogeneous and markedly hyperintense to fat. MRI is superior to all other imaging techniques for evaluation of extent and characterization of vascular soft tissue tumors. Angiography remains helpful in demonstrating feeding or draining vessels.

Adolescent↗
PubMed1992

Diagnostic imaging of muscular tumors.

Eight patients with muscular tumors--all malignant--were reviewed. Seven patients were examined by magnetic resonance imaging. Some of them also underwent conventional radiology and computed tomography. One patient was examined by computed tomography only. An overview and short description of the muscular tumors are given. The findings with the different imaging techniques are presented, followed by a discussion of the role of the imaging techniques. The final conclusion is that MRI is the modality of choice for detection, staging, and follow-up of muscular tumors, although the signal intensity features are not always specific.

Adult↗
PubMed1991

Computed tomography of major salivary gland tumors. A retrospective study of 31 cases.

To assess the value of computed tomography (CT) in grading (benign versus malignant) and characterization of salivary gland tumors we retrospectively analysed the CT examinations of 31 histologically proven cases (15 pleomorphic adenomas, 6 cystadenolymphomas, 1 lipoma, 4 malignant tumors, 4 cysts, and 1 abscess). Subsequently we studied the localization, size, shape, margins, intratumoral calcification, central lucency, local invasion, homogeneity, density, degree and pattern of enhancement after intravenous contrast injection, and presence of enlarged locoregional lymph nodes. A lesion with ill-defined margins, local invasion, diffuse spread throughout the gland and enlarged locoregional lymph nodes was considered malignant. All malignant lesions were correctly diagnosed (no false negative) but 3 benign lesions had malignant features on CT (3 false positives). Further characterization between pleomorphic adenomas and cystadenolymphomas is often impossible. A cystic lesion with papillary contrast-enhancing projections was found in 2 out of 6 cystadenolymphomas and not in other lesions.

Adenolymphoma↗