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排序方式: 共有450条查询结果,搜索用时 218 毫秒
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Agminated segmental plaque‐type blue nevus associated with hypertrichosis and soft tissue hypertrophy: Report of a case and review of the literature 下载免费PDF全文
Manrup K. Hunjan MBChB Desiree Mohandas MD Alina G. Bridges DO Megha Tollefson MD 《Pediatric dermatology》2018,35(1):e22-e28
Blue nevi are common skin neoplasms that typically present as asymptomatic solitary papules, although they may rarely occur in an agminated configuration. We describe a case of agminated blue nevus in a segmental facial distribution associated with soft tissue hypertrophy and hypertrichosis in a 16‐year‐old boy and present a review of the literature. Although they are generally considered to be benign, concurrent soft tissue changes occurring within an agminated blue nevus should be investigated thoroughly to exclude alternate diagnoses. 相似文献
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Raymond F. Hamilton Zheqiong Wu Megha Thakkar Somenath Mitra 《Inhalation toxicology》2013,25(11-12):429-438
AbstractObjective: The toxicity of silver nanomaterials in various forms has been extensively evaluated, but the toxicity of silver nanocarbon composites is less well understood. Therefore, silver-carbon nanotube composites (Ag-MWCNT-COOH) and silver-graphene oxide composites (Ag-GO) were synthesized by microwave irradiation and evaluated in two in vitro cell models.Materials/Methods: Toxicity of silver nanosphere (Ag), Ag-MWCNT-COOH and Ag-GO were analyzed by MTS assay and LDH assay in primary C57BL/6 murine alveolar macrophages and human THP-1 cells. Activation of NLRP3 inflammasome by particle variants in these models was done by proxy using LPS co-culture and IL-1β release.Results: The results depended on the model, as the amount of Ag on the modified carbon resulted in slightly increased toxicity for the murine cells, but did not appear to affect toxicity in the human cell model. IL-1β release from carbon particle-exposures was decreased by the presence of Ag in both cell models. Suspensions of Ag-MWCNT-COOH, Ag-GO and Ag in artificial lysosomal fluid were prepared and ICP-MS was used to detect Ag ions concentration in three silver suspension/solutions. The amount of Ag ions released from Ag-MWCNT-COOH and Ag-GO were similar, which were both lower than that of Ag nanospheres.Conclusions: The results suggest the bioactivity of silver composites may be related to the amount of Ag ions released, which can be dependent on the cell model under investigation. 相似文献
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Sophia Rangwala A.B. Ashley Wysong M.D. M.S. Megha M. Tollefson M.D. Phuong Khuu M.D. Latanya T. Benjamin M.D. Anna L. Bruckner M.D. 《Pediatric dermatology》2014,31(3):402-404
Abstract: Rapidly involuting congenital hemangioma (RICH) is an uncommon, often high‐flow vascular tumor that presents at birth and involutes within the first year of life. It is clinically and histologically distinct from infantile hemangioma, kaposiform hemangioendothelioma, and tufted angioma, the latter two being associated with Kasabach–Merritt phenomenon. We present a female infant with RICH and profound, transient thrombocytopenia and review the extent and clinical course of thrombocytopenia in the context of congenital vascular tumors. 相似文献
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Joshua R. Labott Cody C. Wyles Matthew T. Houdek Megha M. Tollefson David J. Driscoll William J. Shaughnessy Rafael J. Sierra 《The Journal of arthroplasty》2019,34(4):682-685