Pineal Region Cavernoma. Case Report
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A 45-year-old male presented with a rare pineal region cavernoma. Magnetic resonance (MR) imaging confirmed the preoperative diagnosis. The tumor was totally excised. The patient was subsequently cured. Analysis of 15 reported cases found a slight female preponderance. The second and third decades were the most common age group. The course of pineal cavernomas can be complicated by hemorrhage, occlusion of cerebrospinal fluid pathways, and focal neurological and neuroendocrine symptoms but no specific clinical features. However, MR imaging has high sensitivity and the specificity for the diagnosis of pineal cavernoma. Total microneurosurgical excision is the treatment of choice, and patients had an excellent outcome. Stereotactic biopsy can be potentially dangerous because of the risk of hemorrhage. The use of radiosurgery requires evaluation of long-term risks and safe dose levels. Total excision of the pineal cavernoma using microsurgical techniques is the choice of treatment in young and healthy patients since there is an increased risk of recurrent hemorrhage and progressive neurological decline. A conservative approach is preferred in older patients.Keywords:
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Neurosurgeons have preferred to perform the stereotactic biopsy for pathologic diagnosis when the intracranial pathology located eloquent areas and deep sites of the brain.To get a higher ratio of definite pathologic diagnosis during stereotactic biopsy and develop practical method.We determined at least two different target points and two different trajectories to take brain biopsy during stereotactic biopsy. It is a different way from the conventional stereotactic biopsy method in which one point has been selected to take a biopsy. We separated our patients into two groups, group 1 (N=10), and group 2 (N= 19). We chose one target to take a biopsy in group 1, and two different targets and two different trajectories in group 2. In group 2, one patient underwent craniotomy due to hemorrhage at the site of the biopsy during tissue biting. However, none of the patients in both groups suffered any neurological complication related biopsy procedure.In group 1, two of 10 cases, and, in group 2, fourteen of 19 cases had positive biopsy harvesting. These results showed statistically significant difference between group 1 and group 2 (P<0.05).Regarding these results, choosing more than one trajectories and taking at least six specimens from each target provides higher diagnostic rate in stereotaxic biopsy taking method.
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CT-guided stereotactic biopsy is now an accepted method of tissue sampling in intracranial mass lesions but many surgeons still practise freehand burrhole biopsy. This study compares two groups of patients who had either stereotactically guided (n = 153) or freehand (n = 217) biopsy. Stereotactic biopsy has a lower incidence of both mortality (2.6%) and morbidity (1.3%) than freehand (7.8 and 7.8%) while diagnostic accuracy is 92.1 and 64.9%, respectively. The success rate for stereotactic biopsy is independent of the size and depth of the lesion while freehand biopsy is most successful for large, superficial lesions but its success never exceeds 88%. The stereotactic technique is superior to the freehand for all intracranial biopsies regardless of size or site.
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Stereotactic Histologic Biopsy with Patients Prone: Technical Feasibility in 98% of Mammographically Detected LesionsRoger J. Jackman1 and Francis A. Marzoni, Jr.2Audio Available | Share
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A 49-year-old woman underwent 11-gauge vacuum-assisted stereotactic biopsy of a cluster of indeterminate calcifications in the left breast. A clip was deployed accurately at the biopsy site as confirmed on mammograms obtained immediately after biopsy. The patient returned 8 days later for additional stereotactic biopsies of the left breast. Repeat mammograms revealed that the clip deployed at the original biopsy site had migrated 5 cm inferiorly. © RSNA, 2003
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Our present treatment strategy for treating pineal region tumors is shown in Figure 5. We believe that stereotactic biopsy should be the first procedure in pineal region tumors so that a histologic diagnosis can be obtained. Based on the biopsy findings, the appropriate subsequent therapy, whether microsurgery, fractionated irradiation, or stereotactic radiosurgery, can be administered. Although our experience currently is limited to nine patients, we have found that stereotactic radiosurgery is a valuable alternative to microsurgery in the treatment of selected pineal region tumors.
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