PubMed Health⌕ Search

Biomedical subjects

L Cerezal

Publications and source records attributed to L Cerezal.

16 recordsLinked to original sources
PubMed2006

Magnetic resonance urography: a pictorial overview.

Magnetic resonance urography (MRU) can be performed on the basis of two different imaging strategies: static-fluid MRU, based on heavily T2 weighted turbo spin echo (TSE) sequences, and gadolinium-enhanced excretory MRU. Both MR urographic techniques in combination with standard MRI permit a comprehensive examination of the entire urinary tract. This pictorial review illustrates the MRU features of the a wide spectrum of pathological conditions affecting the urinary tract.

Humans↗
PubMed2002

[Spinal angiolipoma: case report].

Spinal extradural angiolipomas are rare benign tumours, accounting for only 0.14-1.2% of all spinal neoplasms. They are usually localized within the thoracic extradural space of the spinal canal and their common clinical presentation is myelopathy, mainly in the way of a slowly progressive paraparesis and sometimes in an acute form. We report the case of a 85 year old man who complained of bilateral lower limb weakness with sphincter disturbance of acute instauration. The MRI showed a posterior extradural lesion at L1-L2 level that compressed conus medularis and cauda equina. He underwent urgent surgical treatment and we achieved total resection of the lesion via a L1-L2 laminectomy. The pathological examination confirmed the tumour as an angiolipoma.

Acute Disease↗
PubMed2002

[Cauda equina meningioma in a girl: presentation of a case and review of the literature].

Meningiomas are unusual in childhood, and the intraspinal location is very uncommon. Those arising from lumbar dura matter are the most rare among spinal neoplasms of meningeal origin. We present the case of a 12-years-old girl with a cauda equina meningioma. As in previously reported cases, the initial complain was back pain with radicular irradiation. The girl had few neurological findings, with pyramidal signs of both lower limbs as single neurological impairment. She underwent surgical treatment through an open door laminoplasty and the tumour was completely removed without neurological deficit. After 2-year of follow-up she remains asymptomatic.

Back Pain↗
PubMed2001

Primary brain lymphoma presenting as Parkinson's disease.

Neoplasm is an uncommon cause of a parkinsonian syndrome. We report a woman with primary brain B-cell lymphoma presenting as Parkinson's disease. After 1 year of the illness, CT and MRI showed lesions without mass effect in the basal ganglia and corpus callosum. The patient did not respond to levodopa and right cerebellar and brain-stem signs appeared, which prompted further neuroimaging, showing an increase in size of the lesions and a right cerebellar and pontine mass. Stereotactic biopsy of the basal ganglia showed high-grade B-cell lymphoma. Despite the basal ganglia frequently being involved in lymphoma of the brain, presentation with typical or atypical parkinsonism is exceptional.

Brain↗
PubMed2001

[Intradural lumbar disk hernia].

Intradural disc herniation is a rare complication of degenerative disc disease. A correct diagnosis of this process is frequently difficult. If this entity is not preoperatively diagnosed and is omitted at surgery, severe neurologic sequels may be provoked. We report a case of a pathologically proven intradural disc herniation preoperatively diagnosed by MR imaging. Clinically, it was manifested by sudden onset of right leg ciatalgia and progressive right lower extremity weakness. The patient also referred a one-month history of sexual dysfunction. MR imaging revealed interruption of the low signal of the anulus fibrosus and of the posterior longitudinal ligament at L2-L3 level and a voluminous disc fragment migrated in the dural sac that showed rim enhancement with gadolinium.The clinical, neuroradiological, and surgical management of lumbar intradural disc herniation are reviewed.

Humans↗
PubMed2000

Chronic nontraumatic spinal epidural hematoma of the lumbar spine: MRI diagnosis.

An uncommon case of chronic nontraumatic spinal epidural hematoma of the lumbar spine in a 75-year-old woman is reported. The patient presented with a 7-month history of low back pain and bilateral sciatica. Magnetic resonance imaging enabled a correct preoperative diagnosis revealing a nodular, well-circumscribed epidural mass with peripheral enhancement and signal intensities consistent with chronic hematoma, which extended from L2 to L3. Laminectomy of L2-L3 was performed and the hematoma was totally resected. Histological examination of the surgical specimen demonstrated a chronic encapsulated hematoma. No evidence of vascular malformation was found. The patient recovered fully after surgical treatment.

Aged↗
PubMed2000

Usefulness of gadolinium-enhanced MR imaging in the evaluation of the vascularity of scaphoid nonunions.

OBJECTIVE: The objective of this article is to identify the role of gadolinium-enhanced MR imaging in the preoperative evaluation of the vascular status of the proximal fragment in scaphoid nonunions. SUBJECTS AND METHODS: Thirty consecutive patients (27 men and three women; age range, 19-52 years; mean age, 28 years) with nonunion of the scaphoid were prospectively examined with unenhanced and gadolinium-enhanced MR imaging. MR images and surgical findings were classified in four groups according to the vascular status of the proximal fragment (normal bone, moderate ischemic bone, severe ischemic bone, and avascular necrosis). Sensitivity, specificity, and accuracy of unenhanced and gadolinium-enhanced MR studies were calculated. Surgical findings were used as the gold standard. The postoperative rate of union at 12 months was evaluated for each group. RESULTS: Unenhanced MR imaging showed a global sensitivity of 36%, specificity of 78%, and accuracy of 68% in the preoperative evaluation of the vascular status of the proximal fragment. Correlation with the surgical findings was not statistically significant (p < 0.149). Global sensitivity, specificity, and accuracy of gadolinium-enhanced MR imaging were 66%, 88%, and 83%, respectively. Correlation with the surgical findings was good (p < 0.0001). Gadolinium-enhanced sequences allowed accurate diagnosis and enabled the creation of prognostic groups having better correlation with surgical findings and postoperative results. CONCLUSION: Gadolinium-enhanced MR imaging is the most reliable imaging method for investigating the vascularity of the proximal pole in scaphoid nonunions.

Adult↗
PubMed2000

Adult choroid plexus papilloma of the posterior fossa mimicking a hemangioblastoma. Case report.

The authors report a case of cystic choroid plexus papilloma that originated in the posterior fossa. No connection with the ventricular system was found intraoperatively. Magnetic resonance (MR) and computerized tomography imaging did not furnish a diagnosis, but findings of pathological examinations were consistent with those of choroid plexus papilloma. The authors describe the different appearances of the tumor on MR images and discuss the differential diagnosis with other tumors of the posterior fossa.

Choroid Plexus Neoplasms↗
PubMed1999

Neuroimaging diagnosis of Tolosa-Hunt syndrome: MRI contribution.

OBJECTIVE: To present our experience in the neuroradiological diagnosis of six patients with Tolosa-Hunt syndrome. METHODS: Computerized tomograms and MRI, with and without contrast enhancement, of the cranium and orbits of patients fulfilling IHS criteria for the diagnosis of Tolosa-Hunt syndrome were analyzed. RESULTS: Standard CT scan, with and without contrast enhancement, disclosed an enlarged cavernous sinus in one patient and was normal in the remaining five. In comparison, MRI was clearly abnormal in the four patients on whom it was performed, showing a convex enlargement of the symptomatic cavernous sinus by an abnormal tissue isointense with gray matter on short TR/TE images and iso-hypointense on long TR/TE scans. This abnormal tissue markedly increased in signal intensity after contrast injection and, in two patients, extended into contiguous regions, mainly the orbital apex and subtemporal fossa ipsilaterally. One patient had follow-up studies after successful treatment with corticosteroids. Although diminished in size, the abnormal tissue was still visible on MRI after 3 months of treatment and only disappeared after 6 months of treatment. CONCLUSIONS: These MRI findings help in the differential diagnosis of the Tolosa-Hunt syndrome from conditions such as meningioma, lymphoma, and sarcoidosis, as well as confirming the similarities of the Tolosa-Hunt syndrome and orbital pseudotumor. In the presence of painful ophthalmoplegia, the finding by MRI of cavernous sinus enlargement, with the herein described signal and extension characteristics and slow resolution with corticosteroid treatment, is highly suggestive of the Tolosa-Hunt syndrome.

Acoustic Stimulation↗
PubMed1999

Tolosa-Hunt syndrome: focus on MRI diagnosis.

Experience with modern neuroimaging techniques, computed tomography (CT) and magnetic resonance imaging (MRI) scans, in the diagnosis of Tolosa-Hunt syndrome (THS) is reviewed. Conventional CT scan remains normal in about two-thirds of these patients. In the reported 22 patients meeting the IHS criteria for a THS diagnosis on whom an MRI study was performed, MRI revealed a convex enlargement of the symptomatic cavernous sinus by an abnormal tissue isointense with gray matter on short TR/TE images and isohypointense on long TR/TE images. This abnormal tissue markedly increases in signal intensity after contrast injection. MRI seems also to be the ideal technique to follow progressive resolution of the abnormal tissue after steroids. Therefore, normal MRI would probably exclude THS, whereas in the appropriate clinical setting of steroid-responsive painful ophthalmoplegia, MRI showing the cavernous sinus abnormality described here suggests a diagnosis of THS. From these data, we propose that the fourth IHS criterion for THS diagnosis, "Exclusion of other causative lesions by neuroimaging and (not compulsory) carotid angiogram" should be changed to "Finding by MRI of specific cavernous sinus abnormalities (with the characteristics described herein) which slowly resolve with steroid treatment".

Humans↗
PubMed1998

Transjugular biopsy of the liver with an automated device.

PURPOSE: To evaluate the results of transjugular liver biopsies conducted with an automated device. MATERIAL AND METHODS: Transjugular liver biopsies were conducted on 37 patients. The principal indication was coagulation disorders. The biopsies were performed with a 1.3-mm automated device. Each patient underwent three biopsies: anterior, lateral and posterior. A fourth biopsy was conducted if the first three did not produce at least one core sample that was sufficient for the histologic diagnosis. RESULTS: Transjugular liver biopsy was successful in all 37 patients. We performed a mean of 3.06 punctures per patient (average 2.86 samples). The length of the samples varied from 5 to 23 mm (mean 13.6 mm). Biopsy specimens were useful for histologic diagnosis in 97% of the cases. No serious complications were caused by the procedure. CONCLUSION: The transjugular liver biopsy technique is an efficient way of obtaining tissue samples. The procedure shows a high success ratio and a low complication rate.

Adolescent↗
PubMed1994

[Collar-button choroidal melanoma. Anatomo-radiologic correlations].

Malignant melanomas of the choroid are the most frequent symptomatic eye tumours in adults. They often have a pathognomonic appearance, being collar-button or mushroom shaped due to rupture of Bruch's membrane by the tumoral mass. The ultrasonographic image of collar-button melanoma is well known: the head of the tumour is hyperechogenic and its base hypoechogenic. According to some authors, this is caused by difference in blood supply between the two parts. At MRI strongly pigmented melanomas emit a high-intensity signal on T1-weighted sequences and a low-intensity signal on T2-weighted sequences, but these characteristic features are inconstant. We present a case of collar-button melanoma explored by ultrasonography, colour Doppler Flow Imaging (CDFI) ultrasound and MRI, then enucleated. Flows and signals were different in front of, or behind the rupture of Bruch's membrane: ultrasounds showed a hyperechogenic image at the head and a hypoechogenic image at the base; on T2-weighted MRI sections intensity was greater in the head than in the base (head: 69 ms, base 180 ms) on CDFI, no flow was detectable in the head and very high flows were seen in the base of the tumour. Comparisons of these images with pathological findings, where there was no difference between head and base in melanin concentration and in cellular type (mixed or mainly epithelioid), led us to believe that the differences observed in images were essentially due to differences in blood supply between the two parts of the tumour constricted by the sides of the ruptured Bruch's membrane.

Bruch Membrane↗