Background: There has been a longstanding debate regarding whether keratoacanthomas (KAs) are neoplastic or reactive/inflammatory lesions. Aim: The aim of this case report is to, within the aforementioned debate, offe...Background: There has been a longstanding debate regarding whether keratoacanthomas (KAs) are neoplastic or reactive/inflammatory lesions. Aim: The aim of this case report is to, within the aforementioned debate, offer support in favor of the potential reactive nature of keratoacanthomas. Case Presentation: A 64-year-old male presented with an eruption of 25 keratoacanthomas within a red ink tattoo. Eruptions were partially resolved over a matter of months, and completely resolved with treatment using oral Acitretin therapy. We believe this to be the third such reported case of eruptive KAs within only the red ink portions of a tattoo. Prior cases involved 2 and 8 KAs each. Discussion: Multiple studies suggest that KAs are neoplastic in nature and very distinct from cutaneous squamous cell carcinoma. Especially interesting is the finding that KAs have increased expression of apoptotic genes;this is particularly notable because of the tendency for these lesions to spontaneously involute. Skin tumorigenesis can occur in predisposed individuals after carcinogen exposure, thus red ink possesses theoretical potential as a carcinogen. KAs could be seen in this case as in fact a reactive neoplasm.展开更多
利用分散法制备铁红色陶瓷釉料墨水。研究分散剂中十六烷基三甲基溴化铵、羧甲基纤维素钠、聚乙二醇400的不同含量对釉料墨水的粘度和电导率的影响,并测定釉料墨水的流变、表面张力及稳定性。结果表明:制备性能优良的釉料墨水,分散剂中C...利用分散法制备铁红色陶瓷釉料墨水。研究分散剂中十六烷基三甲基溴化铵、羧甲基纤维素钠、聚乙二醇400的不同含量对釉料墨水的粘度和电导率的影响,并测定釉料墨水的流变、表面张力及稳定性。结果表明:制备性能优良的釉料墨水,分散剂中CTAB、羧甲基纤维素钠、聚乙二醇400的含量分别为40wt%、45wt%、15wt%;釉料墨水具有一定的触变性,并具有非牛顿性流体的性质,粘度为40 m Pa·s;表面张力随着时间的延长而减小,最终趋向一定值,大小为38.2 m N/m;随着时间的延长,釉料墨水底部沉淀减少,中部稳定性较好,上部的澄清区增加。展开更多
文摘Background: There has been a longstanding debate regarding whether keratoacanthomas (KAs) are neoplastic or reactive/inflammatory lesions. Aim: The aim of this case report is to, within the aforementioned debate, offer support in favor of the potential reactive nature of keratoacanthomas. Case Presentation: A 64-year-old male presented with an eruption of 25 keratoacanthomas within a red ink tattoo. Eruptions were partially resolved over a matter of months, and completely resolved with treatment using oral Acitretin therapy. We believe this to be the third such reported case of eruptive KAs within only the red ink portions of a tattoo. Prior cases involved 2 and 8 KAs each. Discussion: Multiple studies suggest that KAs are neoplastic in nature and very distinct from cutaneous squamous cell carcinoma. Especially interesting is the finding that KAs have increased expression of apoptotic genes;this is particularly notable because of the tendency for these lesions to spontaneously involute. Skin tumorigenesis can occur in predisposed individuals after carcinogen exposure, thus red ink possesses theoretical potential as a carcinogen. KAs could be seen in this case as in fact a reactive neoplasm.
文摘利用分散法制备铁红色陶瓷釉料墨水。研究分散剂中十六烷基三甲基溴化铵、羧甲基纤维素钠、聚乙二醇400的不同含量对釉料墨水的粘度和电导率的影响,并测定釉料墨水的流变、表面张力及稳定性。结果表明:制备性能优良的釉料墨水,分散剂中CTAB、羧甲基纤维素钠、聚乙二醇400的含量分别为40wt%、45wt%、15wt%;釉料墨水具有一定的触变性,并具有非牛顿性流体的性质,粘度为40 m Pa·s;表面张力随着时间的延长而减小,最终趋向一定值,大小为38.2 m N/m;随着时间的延长,釉料墨水底部沉淀减少,中部稳定性较好,上部的澄清区增加。
