1,721,005 research outputs found
Intervertebral disc calcification in childhood: Case report and review of relevant literature
Full text linkThe authors report the case of a 10-year-old girl with intervertebral disc calcifications from the levels C6/C7 to Th1/Th2, presenting with a herniated calcified intervertebral disc at the C7/Th1 level, causing spinal cord compression with subsequent progressive paresis and sensory loss of her left leg. After anterior cervical discectomy and fusion the neurological deficits completely resolved within 2 weeks. It can be concluded that calcification of an intervertebral disc is a rare syndrome in childhood, causing progressive neurological deficit only in a few reported cases. Although the treatment of choice is conservative, surgery is required in patients who develop progressive neurological deficit
Convexal subarachnoid hemorrhage and acute ischemic stroke: a border zone matter?
Full text linkBackground Convexal subarachnoid hemorrhage (c-SAH) is an infrequent condition with variable causes. c-SAH concomitant
to acute ischemic stroke (AIS) is even less frequent, and the relationship between the two conditions remains unclear.
Methods Between January 2016 and January 2018, we treated four patients who were referred to our stroke unit with ischemic
stroke and concomitant nontraumatic c-SAH. The patients underwent an extensive diagnostic workup, including digital subtraction angiography (DSA).
Results All four patients developed acute focal neurological symptoms with restricted MRI diffusion in congruent areas. In three of
the patients, infarcts were in a border zone between the main cerebral arteries and c-SAH was nearby. The fourth patient showed a
small cortical infarct, and c-SAH was in a border zone territory of the contralateral hemisphere. An embolic source was discovered or
strongly suspected in all cases. One patient was treated with intravenous thrombolysis, but this treatment was not related to c-SAH.
None of the four patients showed microbleeds or further cortical siderosis, thus excluding cerebral amyloid angiopathy. In addition,
DSA did not show signs of vasculitis, reversible cerebral vasoconstriction syndrome, or intracranial arterial dissection.
Conclusions We proposed the embolism or hemodynamic changes of the border zone arterioles as a unifying pathogenetic
hypothesis of coexisting c-SAH and AIS
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Pseudoaneurysm formation following intrasphenoidal rupture of an idiopathic intracavernous carotid artery aneurysm:coil migration and early recurrence after recurrence after andovascular treatment
No full textEndovascular treatment of brain arteriovenous malformations ruptured during pregnancy--a report of two cases
No full textAcutely ruptured brain arteriovenous malformations (AVMs) are a known etiology of hemorrhagic stroke during pregnancy. The aim of this paper is to report two cases of patients which presented with ruptured AVMs during pregnancy and were successfully treated with endovascular techniques. Peculiar issues related to the application of this treatment strategy in this category of patients will be discussed as well. To the best of our knowledge, this therapeutic approach in cerebral AVMs ruptured during pregnancy has not been described yet
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