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Biomedical subjects

M Y Jeung

Publications and source records attributed to M Y Jeung.

15 recordsLinked to original sources
PubMed2006

[Pituitary metastases from lung cancer. Five cases].

Pituitary metastases are rare and generally asymptomatic. We studied 5 patients with pituitary metastases from lung cancer, illustrating the different clinical features. These metastases were in these cases symptomatic with the manifestation being diabetes insipidus or visual field defect. Histological subtypes from our five patients were as well small cell or non small cell lung cancer. After diagnosis of pituitary metastasis, prognosis seems to be linked to the histological subtype and the stage of lung cancer, rather than to the presence of such metastases.

Adult↗
PubMed2000

[Diagnostic imaging of the brachial plexus and the cericothoracobrachial outlet].

Imaging of the brachial plexus and of the thoracic outlet syndrome is difficult due to the complex path of the brachial plexus and the morphological variations during the movements. This imaging includes simple radiographs, computed tomographies (CT) and myelo CT scan, magnetic resonance imaging and echo-Doppler. Pathologies of this area include congenital deformities (dysplasia of the upper RIB or of the clavicle), non-malignant or malignant tumors, muscular pathologies, and pathologies of the nerve roots or trunks.

Brachial Plexus↗
PubMed1998

[Imaging of non-small-cell pulmonary tumors. Therapeutic strategy].

In this work the imagery of non-small cell primary bronchial cancers are reviewed. The standard chest x-ray of the thorax remains irreplaceable for the early detection of these pathologies. On the other hand, progress in imagery has propelled thoracic computed tomographic scanning to the pole position for assessing the local and regional extension of the disease as well as for distance spread of these cancers. The latest developments with spiral CT have again improved the performance of CT scanning. Magnetic resonance imaging has a few precisely defined roles in assessing the extension of bronchopulmonary cancers. In particular with involvement of the apices, the chest wall and in the extension into the cardiovascular system. In this article the emphasis is on the illustration of non-small cell bronchial cancers on computed tomography and on magnetic resonance imaging.

Adenocarcinoma, Bronchiolo-Alveolar↗
PubMed1996

Primary hepatic pheochromocytoma.

Pheochromocytomas are uncommon tumors that represent a potentially curable cause of hypertension. They are usually located in the adrenal glands, but 10% arise from extra-adrenal sites, located along the paravertebral sympathetic chains. We report a case of primary hepatic pheochromocytoma responsible for a severe hypertension in a 24-year-old man. Echotomography showed a lightly heterogeneous mass located in the segment 8 of the liver. Iodine 131-metaiodobenzylguanidine scintigraphy showed a large hepatic concentration of the tracer and no other localization. This tumor appeared highly vascularized on enhanced CT scan and on aortic angiography. Magnetic resonance imaging revealed a hepatic tumor with a high signal intensity on T2-weighted images and with a signal isointense to the liver on T1-weighted images. The hepatic venous sampling contained the highest catecholamine level, whereas the adrenal venous sampling was normal. After surgical resection of the hepatic tumor, the tension level and catecholamines plasmatic level normalized. No recurrent symptoms appeared during a 3-year follow-up.

3-Iodobenzylguanidine↗
PubMed1996

Interventional radiologic procedures with CT guidance in cancer pain management.

Reduction of pain without systematic side effects can be achieved in advanced stages of cancer with precise percutaneous techniques guided with computed tomography (CT). CT guidance allows exact needle positioning, reducing complications and improving the results. Regional analgesia with neurolytic block (neurolysis) is achieved by injection of alcohol or phenol and involves intentional destruction of a nerve or nerves to interrupt nociceptive pathways for weeks or months. Percutaneous alcoholization of bone metastasis is indicated in patients with painful, severe, osteolytic bone metastasis if conventional anticancer therapy is ineffective and high doses of opiates are necessary to control pain and when rapid pain relief is necessary. Bone packing with acrylic glue (methyl methacrylate) is used to prevent pathologic fractures and pain in patients with vertebral body tumors and acetabular metastasis. With these techniques, the radiologist is able to play an active role in pain management and in improving the quality of life of patients with malignancies.

Bone Cements↗
PubMed1992

Neurofibromatosis with dural ectasia and bilateral symmetrical pedicular clefts: report of two cases.

We present two cases of bilateral, symmetrical pedicular clefts associated with dural ectasia in von Recklinghausen's disease (neurofibromatosis). In one case the pedicular cleft was at the T12 level, while in the other it was at L4, and was responsible for spondylolisthesis. Two hypotheses are advanced to explain the cleft: (1) a congenital, dysplastic osseous defect and (2) bilateral stress fractures related to thinning of the pedicle caused by dural ectasia.

Adult↗
PubMed1992

[Forgotten mediastinal goiter: seven cases].

The authors relate their experience with 7 cases of mediastinal goiter residual to a subtotal thyroidectomy for substernal goiter. The differential diagnosis with ordinary recurrence was based on the absence of connection with the cervical remnant. The reasons for surgical decision-making was mediastinal compression in 4 patients, hyperthyroidism in 1 patient and absent diagnosis in 1 patient; surgery was systematic in 1 asymptomatic patient. Sternal splitting incision was required in 6 patients: alone in 3, associated with cervical incision in 3 others; excision by an exclusively cervical route was possible in one patient. No malignancy was discovered. Postoperative outcome was uncomplicated in all patients. The residual goiter has the same clinical and paraclinical presentation as the ordinary intrathoracic goiter; treatment should be principally surgical for the same reasons. Nevertheless, for this mediastinal tumor, sternum-splitting incision will be required in most cases.

Aged↗
PubMed1992

CT and MRI of suprasellar lesions.

The authors report their experience of CT and MRI imaging in the study of suprasellar pathologies. The problems concerning the differential diagnosis between meningioma developed in the suprasellar region and pituitary tumour with suprasellar extension are discussed and illustrated; the demonstration of bone abnormalities (blistering, hyperostosis) is particularly useful for the diagnosis of presellar meningioma. The CT and MRI features of craniopharyngioma are compared; CT, of course, is more reliable than MRI in detecting calcifications; with both methods it may be difficult to visualize the cystic components. Glioma of the chiasma is readily diagnosed by MRI, provided the tumour is not too large. Non-thrombosed suprasellar aneurysms have typical features at CT and MRI. Cystic lesions are easily identified by MRI. The CT and MRI images of inflammatory lesions are not very typical.

Brain Diseases↗
PubMed1990

[Abdominal echography in colonic diseases].

In the past few years, several studies have assessed the visualization of digestive diseases by ultrasound, but its clinical accuracy has been rarely defined. Thus we evaluated the contribution of sonographic examination as an initial diagnostic mean in the detection of colonic lesion. During a period of thirty six months (June 85-June 88) when we performed a standard sonographic abdominal examination, we utilized ultrasound to look for thickening or other modifications of the large bowel wall, if the clinical findings suggested a colonic disease. In these conditions we performed 453 US examinations. In our study, 363 cases were considered to be negative and the controls demonstrated colonic wall lesions in 24 cases. Thus the sensitivity was one of 77%. The sonographic examination was positive in 90 cases with 6 false positives. Thus our specificity reached 98.2% and the accuracy achieved was 93.3%. Thus sonographic examination appears to be a rapid, non invasive, mobile, mean of examining the abdominal cavity and also the large bowel in all patients. If this examination is negative, a colonic disease is possible since sensitivity is 77%. On the other hand, if the examination is positive, a colonic disease is very probable, since specificity reached 98.2%. The accuracy of US Colonic examination is 93.3% and with using abdominal plain film, theses percentages may be improved.

Adult↗
PubMed1989

Computed tomography of lumbar apophyseal joint lipoma: report of three cases.

The authors report three cases of lumbar apophyseal joint lipoma located at the L4/L5 or L5/S1 level. CT scan makes the diagnosis easily possible; indeed erosive changes with enlargement of the upper portion of the lumbar articular joint and anterior displacement of the top of the superior facet are associated with intra-articular fatty densities. Clinical symptoms are rarely encountered and may be related to narrowing of the upper portion of the intervertebral foramen.

Adult↗
PubMed1989

[Enteroclysis in malabsorption syndrome in adults. Apropos of 73 cases].

We retrospectively analyzed the small bowel radiographies, performed by enteroclysis in 73 patients presenting a malabsorption disease. The etiology are: celiac disease (44 cases), abetalipoprotidemia (2 cases), Whipple's disease (7 cases), mastocytosis (1 case), amyloidosis (1 case), ischemia enteritis (4 cases), radiation injury (4 cases), lymphangiectasia (4 cases), Crohn's disease (4 cases) and NH lymphoma (2 cases). With enteroclysis, the radiological diagnosis of malabsorption disease is improved and it is able to differentiate malabsorption diseases based on radiological features: increased or decreased number of folds (celiac disease, mastocytosis, abetalipoprotidemia), nodularity of folds (Whipple's disease) and wall thickness (amyloidosis, lymphangiectasia, ischemic enteritis and radiation injury). It is no possible to differentiate NH lymphoma from Crohn's disease.

Adult↗
PubMed1988

Multiple sclerosis and corpus callosum atrophy: relationship of MRI findings to clinical data.

Among 110 patients (45 men, 65 women), aged 15 to 66, with clinical and/or biological diagnosis of multiple sclerosis (MS), severe to moderate corpus callosum (CC) atrophy was observed in 67 (60%) patients. Correlation between CC atrophy, brain atrophy, duration and severity of clinical symptoms, and high signal white matter areas, was carried out in 90 patients. Mean age was 46 years for patients with severe CC atrophy, and 33 years for those without atrophy. Mean duration of the disease was 14 years in patients with severe atrophy, and 5 years in patients without atrophy. Severity of clinical symptoms is more pronounced in patients with severe CC atrophy. Numerous or large white matter high signal areas are observed in patients with severe CC atrophy on T2-weighted images. CC atrophy appears earlier than brain atrophy in the course of MS.

Adolescent↗
PubMedDate not supplied

Imaging of chest wall disorders.

Pathologic processes that may involve the chest wall include congenital and developmental anomalies, inflammatory and infectious diseases, and soft-tissue and bone tumors. Many of these processes have characteristic radiologic appearances that allow definitive diagnosis. Sternal deformities can be visualized at radiography and their severity quantified with computed tomography (CT). In cervical rib, CT with multiplanar reconstruction may demonstrate relevant anatomic detail and the relationship between bone deformity and arterial compression. In Poland syndrome, radiography reveals an area of hyperlucency on the affected side, whereas CT demonstrates the absence of the greater pectoral muscle and clearly depicts associated musculoskeletal anomalies. Tuberculosis typically manifests at radiography and CT as osseous and cartilaginous destruction and soft-tissue masses with calcification and rim enhancement. Aspergillosis involving the chest wall manifests as pulmonary consolidations and permeative osteolytic changes of the rib and spine at CT and as an area of increased signal intensity at T2-weighted magnetic resonance (MR) imaging. Neurogenic tumors and hemangiomas also typically have high signal intensity at T2-weighted MR imaging. Apparent mass extension or unequivocal bone destruction seen at CT or MR imaging may indicate chest wall involvement by lymphoma. Radiologically, soft-tissue sarcomas typically appear as areas of soft-tissue density or attenuation, often associated with necrotic areas of low density or attenuation. At radiography, plasmacytoma typically manifests as well-defined, "punched-out" lytic lesions with associated extrapleural soft-tissue masses. Chondrosarcoma frequently appears as a large, lobulated excrescent mass arising from a rib with scattered flocculent calcifications characteristic of its cartilaginous mix. Familiarity with these radiologic features facilitates accurate diagnosis and optimal patient treatment.

Adolescent↗
PubMedDate not supplied

[Radiologic double-contrast aspects of small esophageal cancers. 38 cases].

Double contrast radiological features of thirty eight small esophageal carcinoma are described. Double contrast study is essential in the detection of small esophageal carcinomas: localized thickening of the folds (29%), localized wall stiffness (23.6%), superficial ulcers (13%), discrete superficial nodule (42%), nodularity (15.7%), and ulcerated nodule (15.7%). In our series, six carcinomas arising from reflux esophagitis have the nodular appearance. As in the majority of the cases, small esophageal carcinomas are asymptomatic, when radiologic study of esophagus is performed in patients over 40 years with heavy alcohol and tobacco use, it is imperative to use the double contrast method and to carefully search for minor mucosal abnormalities.

Adenocarcinoma↗