Ileal obstruction caused by transmural endometriosis in a patient with simultaneous C. difficile colitis and Influenza AH1N1. Case report.

INTRODUCTION: Small bowel obstruction secondary to endometriosis is extremely rare. This etiology is reported in 0.10% of cases and diagnosed incidentally. CASE PRESENTATION: 32-year old female, critically ill patient was diagnosed with small bowel obstruction. After medical stabilization of multiple comorbidities, diagnostic laparoscopy was done and converted to open right ileocolectomy with ileo-transverse anastomosis. Definite diagnosis was ileal obstruction caused by transmural endometriosis. The patient's recovery was uneventful. At one-year follow-up, she remains asymptomatic. DISCUSSION: We present the uncommon case of ileal obstruction due to transmural endometriosis that was treated surgically. We also present current literature review focusing on diagnostic and treatment methods of this rare disease. CONCLUSION: Endometriosis should be included in the differential diagnosis of small bowel obstruction. The treatment of choice is bowel resection.

Comparison of Metal-Backed Free-Space and Open-Ended Coaxial Probe Techniques for the Dielectric Characterization of Aeronautical Composites.

The trend in the last few decades is that current unmanned aerial vehicles are completely made of composite materials rather than metallic, such as carbon-fiber or fiberglass composites. From the electromagnetic point of view, this fact forces engineers and scientists to assess how these materials may affect their radar response or their electronics in terms of electromagnetic compatibility. In order to evaluate this, electromagnetic characterization of different composite materials has become a need. Several techniques exist to perform this characterization, all of them based on the utilization of different sensors for measuring different parameters. In this paper, an implementation of the metal-backed free-space technique, based on the employment of antenna probes, is utilized for the characterization of composite materials that belong to an actual drone. Their extracted properties are compared with those given by a commercial solution, an open-ended coaxial probe (OECP). The discrepancies found between both techniques along with a further evaluation of the methodologies, including measurements with a split-cavity resonator, conclude that the implemented free-space technique provides more reliable results for this kind of composites than the OECP technique.

Posterior fossa tuberculoma in a Huichol native Mexican child: a case report.

BACKGROUND: Tuberculosis is a major health concern in Mexico, especially among the native population. Tuberculomas are a frequent and severe complication of pediatric tuberculosis, these are observed as tumors in neuroimaging studies but are often not diagnosed adequately. CASE PRESENTATION: We present a case of a 12-year-old native Mexican girl Huichol ethnicity diagnosed with a large posterior fossa tuberculoma found by imaging. This tuberculoma was surgically removed. Histopathologic examination and staining with hematoxylin and eosin, and Ziehl-Neelsen techniques of the surgical specimen were performed. Cerebrospinal fluid was analyzed by using the newly available Xpert® MTB/RIF assay (Cepheid, Sunnyvale CA, USA). Granulomatous inflammation with central caseous necrosis surrounded by edematous brain with reactive gliosis and acid-fast bacilli were revealed on histopathologic analysis. Mycobacterium tuberculosis DNA susceptible to rifampicin was detected in the patient's cerebrospinal fluid and the patient was started on anti-tuberculosis treatment. The girl continued to show severe neurologic damage despite surgery and anti-tuberculosis treatment, and she eventually died of respiratory complications. CONCLUSION: Our case highlights the need for early confirmation of tuberculoma diagnosis by molecular assay so that timely treatment can be initiated to prevent severe brain damage. Furthermore, it emphasizes the need to consider tuberculomas in the differential diagnosis of children with neurologic symptoms living in areas of high tuberculosis incidence and those belonging to native populations in developing countries.

Non-cooperative target recognition by means of singular value decomposition applied to radar high resolution range profiles.

Radar high resolution range profiles are widely used among the target recognition community for the detection and identification of flying targets. In this paper, singular value decomposition is applied to extract the relevant information and to model each aircraft as a subspace. The identification algorithm is based on angle between subspaces and takes place in a transformed domain. In order to have a wide database of radar signatures and evaluate the performance, simulated range profiles are used as the recognition database while the test samples comprise data of actual range profiles collected in a measurement campaign. Thanks to the modeling of aircraft as subspaces only the valuable information of each target is used in the recognition process. Thus, one of the main advantages of using singular value decomposition, is that it helps to overcome the notable dissimilarities found in the shape and signal-to-noise ratio between actual and simulated profiles due to their difference in nature. Despite these differences, the recognition rates obtained with the algorithm are quite promising.