12 research outputs found
Intraluminal septation of the basilar artery: incidence and potential clinical significance
Variations in the cerebrovascular tree can increase surgical or interventional
morbidity. To date, only scant comments are to be found in the literature regarding
intraluminal variations of the basilar artery. To further elucidate such
anatomy, a cadaveric study was performed.
One hundred and fifty human brains were evaluated for the present study. The
basilar artery was identified in each and sectioned longitudinally to observe for
the presence of intraluminal septa.
One specimen (0.67%) was identified that harbored an intraluminal septum of
the basilar artery. This wall was within the proximal basilar artery and measured
3 mm by 1.5 mm. No specimen was found to have other anomalies of
the basilar artery and in the single specimen with an intraluminal septum no
signs of intracranial pathology were seen.
Although seemingly rare, septation of the basilar artery can be found. Knowledge
of such an intraluminal vascular variation may be important during invasive
and minimally invasive procedures
Postrenal transplant hemophagocytic lymphohistiocytosis and thrombotic microangiopathy associated with parvovirus B19 infection
Persistent anemia is a known consequence of Parvovirus B19 (B19) infection following renal transplantation. However, to date, no description of B19-related hemophagocytic lymphohistiocytosis (HLH) exists in renal transplant recipients. We report a 24-year-old male kidney recipient, who presented with fever, severe anemia and allograft dysfunction two years following transplantation. Hyperferritinemia, hypertriglyceridemia, elevated serum lactate dehydrogenase, pancytopenia and fragmented red blood cells on the peripheral blood were also noted. Bone marrow examination revealed giant pronormoblasts and frequent histiocytes with intracellular hematopoietic elements, consistent with HLH. Renal allograft biopsy revealed closure of the lumen of glomerular capillaries and thickening of the capillary walls compatible with thrombotic microangiopathy. The presence of anti-B19 IgM antibody and viral DNA in the patient's serum (detected by real-time PCR) confirmed an acute B19 infection. Following high-dose intravenous immunoglobulin therapy, the anemia gradually resolved and renal function improved. As far as we know, this is the first report of B19-associated HLH and thrombotic microangiopathy in a renal transplant recipient. © 2008 The Authors
Excitons in lead iodide
The optical micro-absorption spectrum of a single crystal of lead iodide is compared with two-dimensional exciton theory. While the theory explains the large separation of the first exciton peak and the series limit, it does not explain the large absorption coefficient at the limit