An analysis of a long-lived MCV observed over the Southern Plains using Potential Vorticity diagnostics.

On the morning of 28 May 1998, a mesoscale convectively-generated vortex (MCV) was observed over the Southern Plains. This MCV was evident in the GOES-8 visual satellite imagery resulting in a spectacular picture. An analysis of this event is offered using many data sources, including products available now via the world-wide-web (WWW), the National Center for Environmental Prediction (NCEP) re-analyses, and Eta model initializations. This MCV developed out of a mesoscale convective system (MCS) that existed during 26 and 27 May over Texas. This MCV was associated with reports of severe weather and heavy precipitation over southern Arkansas. While the MCV is shown to have characteristics similar to other MCV events documented, this event is unique in that it maintained it's character, while propagating further east than other events. A dynamical analysis using potential vorticity diagnostics (PV) shows that the mid-latitude vorticity field strengthened at least partially as a result of diabatic heating. Also, the most severe weather was associated with high values of integrated 500 - 300 hPa PV values over the Southern Plains

Late posterior hip instability after lumbar spinopelvic fusion

The kinematic relationship between the hip and the axial skeleton is dynamic and can be variable based on individual anatomy. It has been shown [1] that pelvic incidence (sacral slope + pelvic tilt) can be used as a proxy to determine the ability of the pelvis to accommodate changes in sagittal balance. Individuals have varied pelvic incidence and thus may adapt differently degenerative and/or iatrrogenic to changes that occur in the axial spine. This is a case report in which surgical changes to the lumbopelvic spine resulted in chronic posterior periprosthetic hip instability. The focus of this discussion reflects the intimate relationship between the hip and spine and highlights the role between sagittal balance and acetabular version, specifically as it pertains to total hip arthroplasty

Papillary Carcinoma Occurrence in a Thyroglossal Duct Cyst with Synchronous Papillary Thyroid Carcinoma without Cervical Lymph Node Metastasis: Two-Cases Report

Background. We present two rare cases of papillary carcinomas which appeared in thyroglossal duct cysts. These cases highlight that thyroglossal duct cyst can serve as malignancy of thyroid gland. Methods. A retrospective case report was carried out on 2 patients at Cipto Mangunkusumo Hospital. Results. A 57-year-old man presented with enlarged right anterior and midline neck mass, which preoperatively were diagnosed as thyroglossal duct cyst (TDC) and nontoxic multinodular goiter. A total thyroidectomy and Sistrunk procedure were performed. In the second case, a 35-year-old woman presented with a lump which occurred at anterior neck region without palpable mass at the thyroid. Preoperatively, it was diagnosed as TDC. Sistrunk procedure was performed, followed by total thyroidectomy a month after the first operation. Histopathology showed papillary thyroid carcinoma in both patients. Conclusion. The occurrence of carcinoma in TDC is very rare but should always be considered as an option in making diagnosis for a neck mass

Association between the timing of surgery for complicated infective endocarditis and survival

International audienc

Association between the timing of surgery for complicated infective endocarditis and survival

International audienc

Increased frontal lobe phosphocreatine levels observed in heavy cocaine users after treatment for cocaine dependence - An 1 H MRS T 2 relaxometry study

Abstract. We have recently reported that relative concentrations of phosphocreatine (PCr) and creatine (Cr) may be estimated from brain 1H MR spectra based upon T2 relaxation times. Emission tomography studies have consistently associated cocaine dependence and abstinence with decreased cerebral metabolism. We hypothesized that increased frontal lobe PCr levels would accompany treatment for cocaine dependence. Twenty-four cocaine dependent (CD) subjects were studied before and after 8 weeks of cocaine dependence treatment. Nine comparison subjects were studied at the same time points. At baseline, left frontal lobe ratios of PCr/tCr were 0.406 ± 0.081 in CD subjects and 0.411 ± 0.016 in comparison subjects. After treatment, these ratios increased 14.3% (0.464 vs. 0.406; p = 0.006) in CD subjects, remaining unchanged in comparison subjects (2.9%, 0.399 vs. 0.411; p = 0.480). At baseline, PCr levels of non-responders were 17.8% lower (0.375 vs. 0.442; p = 0.042) than those of responders, defined as 25% decrease in urine cocaine metabolites. After treatment, CD subjects had increased PCr levels: 18.4% (0.444 vs. 0.375; p = 0.035) for non-responders and 10.4% (0.488 vs. 0.442; p = 0.092) for responders. These results are consistent with decreased cerebral metabolism during treatment, measured as increased PCr. This is the first report using 1 H MRS T2 relaxometry to measure a change in human brain energetics