Search PubMed⌕ Search

Biomedical subjects

J Thiebot

Publications and source records attributed to J Thiebot.

At least 19 recordsLinked to original sources
PubMed2004

Diagnosis of spinal dural arteriovenous fistula with multidetector row computed tomography: a case report.

Spinal dural arteriovenous fistulas are a rare cause of myelopathy. Nonspecific symptoms may delay the diagnosis. Magnetic resonance imaging and spinal angiography are routinely used to establish the diagnosis. In our case abnormalities on magnetic resonance imaging only suggested spinal dural arteriovenous fistulas. Multidetector row computed tomography (MRCT) led to the diagnosis which was confirmed by angiography.

Central Nervous System Vascular Malformations↗
PubMed1997

[Spontaneous thrombosis of cerebral arteriovenous malformation].

Complete disappearance of a cerebral arteriovenous malformation (AVM), 9 years after its discovery, is reported in a 45-year-old man. This unusual evolution was revealed by the onset of 3 seizures. CT scan and MR imaging eliminated any hemorrhage and carotid angiography showed the spontaneous thrombosis of the whole malformation. The evolution of the MRI signals demonstrates that seizures and the disappearance of the AVM were concomitant. It is suggested that the spontaneous thrombosis of the venous drainage caused the AVM disappearance with cerebral oedema responsible of seizures.

Epilepsy, Generalized↗
PubMed1997

[Spontaneous intracranial hypotension syndrome. A case].

We report a 49-year-old woman with spontaneous intra-cranial hypotension. this characteristic syndrome associates postural headache and a low cerebro-spinal fluid pressure. It was confirmed by lumbar puncture and magnetic resonance imagery. We describe the clinical and the cerebro-spinal fluid features, the radiological appearances, and the clinical and radiological course. The interests of this diagnosis are, first, its spontaneous benign course and, second, to avoid unnecessary invasive investigations.

Female↗
PubMed1996

[Lumbar interapophyseal septic arthritis. Apropos of 3 cases].

Septic arthritis of spinal apophyseal joint, seldom described, mainly concern the lumbar spine. We report three cases. Inflammatory lesions of the paravertebral soft tissues were associated in each case; an epidural abscess was present twice. Our three cases were due to Staphylococcus aureus. The initial clinical features were consistent with a spondylodiscitis. Imaging led to the correct diagnosis in all cases. According to our observations and several others of the literature: facet joint lesions are visible too late on plain films. Bone scintigraphy is sensitive, but not specific. CT scan and MRI are the most contributive investigations. A pathologic aspect of the paravertebral soft tissues is visible less than one week after the beginning of the symptoms on CT scan and MRI. Lesions of the facet joint are detectable as soon as the first week on MRI, and after 15 days of clinical course on CT scan. Epidural abscess, when present, is best shown by MRI as early as the first week. CT scan can guide percutaneous needle biopsies of the paravertebral abscesses or of the concerned facet joint.

Abscess↗
PubMed1991

Spontaneous intracerebral hematomas from vascular causes. Predictive value of CT compared with angiography.

The aim of the present study was to assess the diagnostic accuracy of CT in determining the underlying causes of brain hematomas with a state-of-the art CT. For this purpose, CT and angiographic data of 149 subjects with spontaneous intracerebral hematomas (ICH) were statistically compared in a blind, retrospective study, taking angiography, supported when possible by surgical findings, as providing the correct diagnoses. 5 groups were distinguished on the basis of CT data: 103 patients with isolated deep ICH had normal angiograms; 9 patients with isolated superficial ICH and 8 with deep ICH and intraventricular hemorrhage (IVH) had arteriovenous malformations (AVMs). 4 with this combination showed no angiographic abnormalities, one had an aneurysm. 14 subjects with ICH and subarachnoid hemorrhage (SAH) had a middle cerebral or carotid artery aneurysm; and 10 with ICH, SAH and IVH had also an aneurysm, in 7 on the anterior communicating artery. Sensitivity, specificity, positive and negative predictive values were respectively: for AVMs 100, 96, 77 and 100%; and for aneurysms 96, 100, 100 and 99%. Kendall coefficient was 0.95, indicating close correlation between the two modalities. This study confirms that CT can accurately predict the likelihood, nature and location of vascular ICHs. It indicates whether angiography is necessary or not, and if so, what vascular tree ought to be explored.

Adolescent↗
PubMed1991

[Maxillofacial injury and x-ray computed tomography].

Facial injuries often occur as a result of cranio-encephalic trauma. They are preferentially studied by CT. In the emergency situation, CT is primarily useful to identify post-traumatic brain damage, which determines the vital prognosis. The study of the orbital apex and temporomandibular joint in the same session provides useful information about the functional prognosis. Further CT studies are required for a complete maxillofacial evaluation. They are usually performed 6 days after the trauma. Coronal and axial thin slices provide a definitive assessment of the bony structures involved. These two CT examinations warrant optimal preoperative planning.

Humans↗
PubMed1991

[Radiologic diagnosis of post-traumatic cerebrospinal rhinorrhea].

It is imperative to identify the cause of cerebrospinal fluid (CSF) leak due to the major risk of infectious complications. Mainly the consequence of a skull base or facial trauma, its most frequent symptom is rhinorrhea. It represents a real diagnostic, clinical and radiological challenge. Two extreme situations raise different problems: either CSF leak is active, with important facial damage involving frontal, ethmoidal or sphenoidal sinuses and petrous bone; in such cases, evaluation by CT is sufficient and easy. Or the leak has dried up, there is no evidence of bony fracture; it is imperative to localize the exact site of the bony or dural defect: CT in axial and coronal planes with thin slices, computerized tomographic cisternography with non ionic water soluble contrast media in order to exhibit the leak in the paranasal sinuses. In some cases however, pitfalls still occur in the determination of such meningeal fistulae.

Cerebrospinal Fluid Rhinorrhea↗
PubMed1990

Primary left atrial angiosarcoma: follow-up by magnetic resonance imaging.

We report the case of a primary left atrial angiosarcoma followed by MRI over a period of 1 year. The tumor was lobulated, with an initial central hyperintensity on T1-weighted images which disappeared after radiotherapy. Compared with other imaging modalities, MRI offered the most accurate information about the location, extent, and outcome under treatment.

Adult↗
PubMed1990

[The value of a computer tomography scanner and controlled arteriography in the study of the results of aneurysm surgery. A series of 100 consecutive cases].

A total of 100 consecutive patients, (93 with ruptured aneurysms, 7 with asymptomatic aneurysms) were managed following a radio clinical investigation protocol. Preoperative evaluation included clinical grading (Hunt and Hess) (20 patients were GR I, 43 GR II, 19 GR III, 9 GR IV and 9 GR V) angiography and CTScan grading. The timing of surgery was determined according to angiographic, clinical and CTScan data: 73.2% of ruptured aneurysms were operated on between Day 0 and Day 3. Control angiography and control CT were performed 10-12 days after surgery (earlier in case of clinical deterioration). Post operative CTScan hypodensities were evaluated according to preoperative CT, preoperative angiography and post operative angiography: 32 hypodensities (8 without any symptom) were related to initial hemorrhage, vasospasm or post surgical thrombosis. In five cases the etiology was dobble. Angiographic control data showed 18 cases of vasospasm and 12 cases of post surgical thrombosis. We did not find any complication due to the control angiography. The outcome was classified according to the Glasgow Outcome Score (GOS): of 82 GR I.II.III (H & H) cases, the outcome was 73 GOS 1-2 cases, 3 GOS 3 Cases, 1 GOS 4 case and 5 GOS 5 cases. of 18 GR IV.V (H & H) cases, the outcome was 4 GOS 1-2 cases, 1 GOS 3 case, 1 GOS 4 case and 12 GOS 5 cases. In 28 GOS 2-3-4-5 cases, the cause of disability or death was under the main responsibility of the initial hemorrhage 13 times, of a thrombosis 11 times, of the vasospasm 4 times with associated non neurological problems in seven cases. When the control angiography is not performed and when the thrombosis is unrecognized sequellae or death can be erroneously attributed in many cases to the sole vasospasm or to the initial hemorrhage.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1989

[The STIR sequence. Comparison with other MRI sequences and scintigraphy in detecting spinal metastases].

A prospective MRI study of the spine comparing short inversion-recovery sequences (STIR)-one the features of which is to potentiate the contrast of both long T1 and T2 sequences-with other spin echo and/or gradient echo MRI sequences, was conducted in 20 patients with suspected vertebral metastases. The features of the signal on STIR sequences were initially defined in 14 healthy volunteers. In the patients, the various MRI sequences were also compared to each other and to standard x-rays and bone scans. The sensitivity of detection of vertebral metastases did not appear to be significantly different between T1 sequences and the STIR sequence. However, these two sequences appeared to be significantly more sensitive than T2-weighted sequences. The STIR sequences therefore appears to be a logical complement to T1-weighted sequences in the detection of vertebral secondaries. This sequence even appears to be superior in the following situations: investigation of the cervical vertebrae, follow-up of irradiated bone, early detection of periduritis and lesions of the posterior arch.

Adult↗
PubMed1988

Intracranial aneurysmal bone cyst: a rare CT appearance.

Aneurysmal bone cyst occurring within the calvarium is uncommon. We report a case presenting as an intracranial space-occupying lesion. Fluid levels within a lesion on CT is very suggestive but inconstant. The theory of a pre-existing lesion is noted.

Bone Cysts↗
PubMed1988

[Optochiasmatic tuberculoma and MRI. 2 cases].

Two cases are reported of optochiasmatic tuberculoma, an exceptional complication difficult to diagnose in the absence of any tuberculous context. Although diagnosis of the optochiasmatic occupying process is simple by scan or NMR imaging, it is generally difficult to identify the chiasma in a process of this type. It is therefore impossible to recognize the two forms of these tuberculomas: intra- and peri-chiasmatic histologic types, and yet these have an incidence on therapy and prognosis. Surgical exploration is justified when the diagnosis remains in doubt or when the functional prognosis is implicated.

Adult↗