Acquired arteriovenous hemangioma on the nose of a middle-aged man: A case report.

Arteriovenous hemangioma is a rare, benign vascular lesion that presents with an asymptomatic red or violaceous papule which is frequently asymptomatic but pruritus, pain and enlargement may be seen in some patients. In histology it is composed of thick-walled and thin-walled blood vessels distributed in superficial and mid dermis. The treatment of choice in such cases is complete excision and recurrence is rare. In this article we describe an acquired form of arteriovenous hemangioma on the nose of a middle-aged man.

Near field and far field plasmonic enhancements with bilayers of different dimensions AgNPs@DLC for improved current density in silicon solar.

The effect of a bilayer of different dimension silver nanoparticles (Ag NPs) on light trapping in silicon solar cells is investigated. Here, we report on the improved performance of silicon solar cells by integrating two layers of silver nanoparticles of different sizes. We experimentally examine the plasmonic near-field and far-field effects of bilayer Ag NPs embedded within an anti-reflective DLC layer on silicon solar cells' optical and electrical characteristics. Field-Emission Scanning Electron Microscopy drove the two-dimensional differences in the size of Ag NPs. The surface plasmon resonance of the two-dimensional nanoparticles was estimated from the absorption optical spectra. External quantum efficiency measurements showed that near-field or far-field plasmonic effects altered with the Ag NPs size. The development of far fields was confirmed by measuring the solar cell performance under AM 1.5 G illumination. The impact of the far-field in the cell containing two layers of Ag NPs, which outer layer is larger dimensions NPs, improves the current density up to 38.4 mA/cm2 (by 70% compared to the bare reference cell).

Adrenal insufficiency attributable to adrenal hemorrhage: long-term follow-up with reference to glucocorticoid and mineralocorticoid function and replacement.

OBJECTIVE: To describe the long-term follow-up of acute adrenal insufficiency attributable to bilateral adrenal hemorrhage. METHODS: We performed a retrospective review of medical records of four patients who underwent follow-up for 6(1/2) to 19 years. RESULTS: Despite published reports of more than 500 patients with bilateral massive adrenal hemorrhage through 2001, no long-term data assessing the continuing requirements for glucocorticoid and mineralocorticoid replacement are available. After follow-up of four patients with acute bilateral adrenal hemorrhage and glucocorticoid insufficiency for 6(1/2) to 19 years, we document the absence of need for long-term mineralocorticoid replacement on the basis of no occurrence of postural hypotension, normal electrolytes, normal baseline or cosyntropin-stimulated serum aldosterone levels, and generally, though not invariably, normal plasma renin activity levels. We further document the improvement in either or both baseline and cosyntropin-stimulated serum cortisol levels in three of the four patients and the ability of one patient to function normally without cortisol replacement for 4 years. Adrenal histologic findings in this last-mentioned patient revealed previously undescribed changes consistent with regeneration and myelolipoma. Finally, we confirm bilateral atrophic adrenal glands by computed tomography 5(1/2) to 11(1/2) years after bilateral adrenal hemorrhage in three of the four patients. CONCLUSION: Long-term follow-up of patients with acute adrenal insufficiency attributable to adrenal hemorrhage demonstrates, for the first time, absence of need for prolonged mineralocorticoid replacement and some improvement in endogenous glucocorticoid function in at least some of these patients.