48 research outputs found
Low-k dielectrics for trench isolation in nanoscaled CMOS imagers Journal of Vacuum Science Technology B, 27 (1) 2009
No full textPost-radiation gliomas.
No full textAIMS AND BACKGROUND:
Radiotherapy is important in the treatment of neoplasm of the central nervous system, but various side effects, particularly neoplastic, have been described. Recently, post-radiation gliomas have been reported.
METHODS:
The authors review 88 cases of cerebral glioma following radiotherapy in patients operated for neoplasms of the nervous system, including 6 personal cases of post-radiation gliomas treated in the Neurosurgical Division of the Department of Neurological Sciences, "La Sapienza" University, Rome. The criteria used to define this unusual pathologic association are discussed.
RESULTS:
There was a male predominance. Post-radiation gliomas were particularly malignant, the average dose was 33 Gy, and average free latency was 9.6 years. The first disease was most frequently acute lymphatic leukemia.
CONCLUSIONS:
Post-radiation gliomas have particular features but do not present a histologic or clinical behavior different from analogous spontaneous gliomas. The fact that 88 cases have been reported in recent years suggests that a thorough biological, clinical studies be carried out on this association
L'actinomicosi intracranica
No full textActinomycosis is a bacterial infection mainly affecting the cervico-oro-facial area, abdomen and lungs, sometimes spreading to the central nervous system. Extremely rare is the primary cerebral location of the disease
“STABILITY AND SEISMIC VULNERABILITY OF THE STYLITE TOWER AT UMM AR-RASAS„
No full textThe stability and vulnerability analyses carried out on the Stylite tower at Umm ar−Rasas, Jordan, are presented in this paper. The tower is a unique example of this kind of structure still existing. The soil and the structural material were analyzed by means of in situ ex− perimental tests. These consisted of Schmidt−hammer tests on stone blocks and passive seismic measurements. The stability of the tower was first analyzed, assuming an elastic – perfect plastic behavior in compression for masonry. Then the push−over seismic analysis was carried out, which was based on a single−mode approach and a finite solid element modelling with a Drucker−Prager yield criterion for masonry. The work is propaedeutic to the design of a retrofit intervention
Gas-containing lumbar disc herniation. A case report and review of the literature
No full textThe finding of gas into the intervertebral disc space ("vacuum phenomenon") is relatively common, whereas gas-containing cervical or lumbar disc herniations are rarely observed. A case of a patient with bilateral leg pain, provoked by a computed tomography scan and surgically documented L4-L5 gas-containing disc herniation is reported and the cases previously described in detail are reviewed, to define the pathophysiologic and diagnostic aspects of this rare phenomenon associated with a herniated disc fragment
Solitary cerebral metastasis as first symptom of lung cancer
No full textThe authors report 35 cases of solitary brain metastasis from lung cancer manifesting clinically before the primary tumor. Surgical removal was total in 27 cases and partial in 8. All patients received postoperative radiotherapy. The primary tumor was diagnosed during the hospital stay in 12 cases, within two months of discharge in 18 cases, at necropsy in 5 cases. Median survival of patients was 16 months and the main cause of death was progression of the primary cancer (72% of cases). The clinical and pathological characteristics of solitary brain metastasis from lung cancer are reported in the light of the present 35 cases and those reported in the literature
