ABSTRACT
The insertion of the inflation needle during laparoscopic procedures carries the risk of severe vascular damage to the aorto-cava bifurcation. Interindividual anatomic variation is great as shown by magnetic resonance imaging, increasing the risk of vascular damage. Four simple technical precautions are recommended to prevent accidents: insertion at the lower umbilical margin, widen distance between the umbilicus and the greater vessels, a 45 degree insertion angle and strictly medial position.
Subject(s)
Aorta, Abdominal/injuries , Aortic Diseases/prevention & control , Laparoscopy/adverse effects , Pneumoperitoneum/complications , Vena Cava, Inferior/injuries , Aortic Diseases/etiology , HumansABSTRACT
Leiomyoma of the adrenal gland is an exceptional localization. We report a case occurring in a young patient with AIDS. Diagnosis was a surprise on pathologic examination. On enhanced computed tomographic (CT) scan, the adrenal mass had a low central attenuation area and a thin enhancing peripheral ring. On magnetic resonance (MR) imaging the left adrenal mass was isointense with the liver on T1-(TR/TE = 500/300 ms) and T2-(TR/TE = 2030/60, 120 ms) weighted spin-echo images, except a central area with a lower signal on T1-weighted images and a higher signal on T2-weighted images. The mass was slightly enhanced after Gd-DOTA injection, but the central area remained unchanged.
Subject(s)
Acquired Immunodeficiency Syndrome/complications , Adrenal Gland Neoplasms/diagnosis , Leiomyoma/diagnosis , Adrenal Gland Neoplasms/complications , Adrenal Gland Neoplasms/diagnostic imaging , Adult , Humans , Leiomyoma/complications , Leiomyoma/diagnostic imaging , Magnetic Resonance Imaging , Male , Tomography, X-Ray ComputedABSTRACT
An obese patient with bilateral sciatic pain had epidural lipomatosis on magnetic resonance examination. Treatment that used a weight-reduction program eliminated the symptoms, and after magnetic resonance imaging, revealed reduction of the lipomatosis deposits.
Subject(s)
Diet, Reducing , Epidural Space , Lipomatosis/diet therapy , Lipomatosis/diagnosis , Humans , Magnetic Resonance Imaging , Male , Middle Aged , Spinal Diseases/diagnosis , Spinal Diseases/diet therapyABSTRACT
We report two cases of multiple sclerosis with concentric patterns of demyelinated foci on MR images. These were compared with the pathological data of Balò's disease. The T2-weighted MR images displayed alternating high and low signal areas which probably corresponded to the concentric type of demyelination. Our two cases were characterized by their acute onset and their regression following corticosteroid therapy. This suggests that Balò's disease may be a transient disease and not always associated with a fatal course.
Subject(s)
Magnetic Resonance Imaging , Multiple Sclerosis/diagnosis , Adult , Brain/pathology , Demyelinating Diseases/diagnosis , Demyelinating Diseases/pathology , Diffuse Cerebral Sclerosis of Schilder/diagnosis , Diffuse Cerebral Sclerosis of Schilder/pathology , Female , Humans , Magnetic Resonance Imaging/methods , Male , Multiple Sclerosis/pathologyABSTRACT
We report four cases of trigeminal neuroma. One of the patients had von Recklinghausen's neurofibromatosis with plexiform neurofibromas of the branches of the trigeminal nerve. MRI provided more information than CT as regards the spread of tumour: extension to the mandibular and maxillary division of the trigeminal nerve was well demonstrated on sagittal and coronal sections. This examination yielded an accurate census of the intraocular plexiform neurofibromas and allowed a correct preoperative diagnosis to be obtained. With Gd-DOTA, better definition of the outline of the tumours and of cystic components was obtained. However, CT was better for demonstration of bone erosions.
Subject(s)
Cranial Nerve Neoplasms/diagnosis , Magnetic Resonance Imaging , Neuroma/diagnosis , Tomography, X-Ray Computed , Trigeminal Nerve , Adult , Cranial Nerve Neoplasms/diagnostic imaging , Female , Humans , Male , Middle Aged , Neuroma/diagnostic imaging , Trigeminal Nerve/diagnostic imaging , Trigeminal Nerve/pathologyABSTRACT
Twenty-two patients with 25 cases of focal nodular hyperplasia (FNH) proved with pathologic study were imaged with a TurboFLASH (fast low angle shot) sequence combined with bolus administration of gadolinium tetraazacyclododecanetetraacetic acid (DOTA), spin-echo (SE) T2-weighted sequences, and postcontrast T1-weighted sequences. FNH-liver signal-difference-to-noise ratios were quantified; the features of the central scar were qualitatively analyzed. On SE T2-weighted images, all FNHs were hyperintense; in two cases the central scar exhibited a high signal intensity associated with hypointense areas corresponding to fibrous tissue within the branches of the scar. Unenhanced TurboFLASH images always demonstrated the FNHs as hypointense and always depicted the central scar as a hypointense area within the lesion. After bolus injection, arterial enhancement of FNH was clearly seen, and in 10 of 25 lesions, enhancement within the scar was seen 40-80 seconds after injection. Both unenhanced and enhanced TurboFLASH sequences produced the best signal-difference-to-noise ratios in comparison with T2-weighted images.
