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Tinnitus is the perception of sound in one or both ears when no external noise exists to cause that perception. It can be otological, neurological, drug-related, traumatic, due to exposure to high decibel levels, or associated with a vascular abnormality—the latter usually causing pulsatile tinnitus. We present the diagnostic image of a patient with pulsatile tinnitus with terminal plate dehiscence of the jugular bulb and review the diagnostic workup. Jugular bulb dehiscence is a venous variant that consists of an upper and lateral extension of the jugular bulb into the middle ear through a dehiscent sigmoid plate. It is the most common vascular anatomical variant of the petrous portion of the temporal bone. Imaging studies are essential for establishing a diagnosis and defining possible anatomical variants.

This case report presents a lipofibromatous hamartoma of the median nerve in a 31-year-old man who presents local deformity and a sensory deficit in the nerve territory. The tumor was evaluated with magnetic resonance, computed tomography, and plain film radiography, studying the pathognomonic findings of this tumor. The patient did not want surgical treatment because of prior surgical sequelae. A prior surgical biopsy was reported as a peripheral nerve with normal axonal fascicles surrounded by abundant fibroadipose tissue. This tumor has a low incidence with less than 180 cases reported in the literature.

Polyaniline PANI “nanograss” was grown on carbon nanofibers CNFs. The cure behavior of an epoxy resin with and without unmodified CNFs or PANI modified CNFs was studied by means of nonisothermal and isothermal differential scanning calorimetry DSC. CNFs accelerated the reaction of epoxy and diamine. PANI surface modification further increased the reaction rate and the extent of reaction. An autocatalytic cure kinetic model was used to fit the reaction curves. It was found that activation energies of the epoxy reaction decreased in the presence of CNFs and PANI modified CNFs. The observed catalytic effect of CNF and PANI surface coating can be very useful for low temperature cure of large epoxy composite products. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 [ABSTRACT FROM AUTHOR]

Introduction: The preoperative marking of different breast lesions can be done using several methods. The aqueous carbon suspension (ACS) used as a marker, is a simple and low cost technique. Clinical case: The case of a 47-year old female patient who comes presenting a BIRADS 4 lesion in the upper internal quadrant of the right breast previously, identified through a mammography. A marking was done through a sonogram guided ACS. The General Surgery Service performed the excision of the marked tissue, corroborating the presence of the lesion and of the carbon in the excised tissue. The path report identified fibrocystic changes. The carbon did not interfere with its evaluation. Conclusion: The preoperative marking with ACS has several advantages: it is performed as an outpatient procedure with local anesthesia and allowing the surgical excision during the next three weeks. The identification of the lesion by the surgeon and the pathologist is more precise, apart from being less costly. [ABSTRACT FROM AUTHOR]