An appendiceal neurofibroma(ANF) is a rare neoplasm associated with neurofibromatosis type 1(NF-1),an inheritable neurocutaneous disorder that involves multiple systems including the intraabdominal organs.Appendiceal ...An appendiceal neurofibroma(ANF) is a rare neoplasm associated with neurofibromatosis type 1(NF-1),an inheritable neurocutaneous disorder that involves multiple systems including the intraabdominal organs.Appendiceal diverticulitis occasionally ruptures in the absence of intense abdominal pain,which can lead to serious consequences.Recent reports highlight the association between appendiceal diverticulum and appendiceal neoplasms; however,there is still little information on the association between appendiceal diverticulitis and ANF in NF-1.A 51-year-old Japanese male with NF-1 was referred to the division of surgery for mild right lower quadrant pain.It was suspected he had perforated acute appendicitis with periappendiceal abscess based on clinical manifestations and findings of computed tomography.An emergency appendectomy was conducted.The pathological examination revealed diffusely proliferated tumor cells of a neurofibroma,coexistent with multiple appendiceal diverticulums,leading to the diagnosis ofperforated appendiceal diverticulitis associated with ANF.Although he developed a remnant abscess,he recovered with the conservative treatments of antibiotics and drainage.This case suggests that appendiceal diverticulitis might be a complication of appendiceal involvement of NF-1,and that it occasionally ruptures in the absence of intense abdominal pain.Clinicians should recognize that NF-1 can cause various abdominal manifestations.展开更多
The surface water samples were collected in river Dahe and its tributaries, which flow into severely eutrophic lake Dianchi, Yunnan Province, China, in order to elucidate factors controlling water quality fluctuations...The surface water samples were collected in river Dahe and its tributaries, which flow into severely eutrophic lake Dianchi, Yunnan Province, China, in order to elucidate factors controlling water quality fluctuations. The temporal and spatial distribution of water quality tendency was observed. The water quality of each river is dependent on the hydrology effect such water gate and circulating irrigation system. We must consider the hydrology effect to accurately understand water quality variations of river in this study field. In river without highly circulating irrigation system or water gate effect, the downstream nitrate nitrogen （NO3-N） concentration increase occurred in area dominated by open field cultivation, whereas the NO3-N concentration was constant or decreased in area dominated by greenhouse land use. This result suggests that greenhouse covers the soil from precipitation, and nitrate load of greenhouse could be less than that of open field cultivation while the rainfall event. In the upper reaches of river, where is dominated by open field cultivation, there were no sharp increase dissolved molybdate reactive phosphorus and total phosphorus concentration, but P load was accumulated in the lower reaches of river, whose predominant land use is greenhouse. Although the P sources is unclear in this study, greenhouse area may have potential of P loads due to its high P content in greenhouse soil. Considering hydrology effect is necessary to determine what the major factor is influencing the water quality variation, especially in area with highly complicated irrigation system in this studying site.展开更多
文摘An appendiceal neurofibroma(ANF) is a rare neoplasm associated with neurofibromatosis type 1(NF-1),an inheritable neurocutaneous disorder that involves multiple systems including the intraabdominal organs.Appendiceal diverticulitis occasionally ruptures in the absence of intense abdominal pain,which can lead to serious consequences.Recent reports highlight the association between appendiceal diverticulum and appendiceal neoplasms; however,there is still little information on the association between appendiceal diverticulitis and ANF in NF-1.A 51-year-old Japanese male with NF-1 was referred to the division of surgery for mild right lower quadrant pain.It was suspected he had perforated acute appendicitis with periappendiceal abscess based on clinical manifestations and findings of computed tomography.An emergency appendectomy was conducted.The pathological examination revealed diffusely proliferated tumor cells of a neurofibroma,coexistent with multiple appendiceal diverticulums,leading to the diagnosis ofperforated appendiceal diverticulitis associated with ANF.Although he developed a remnant abscess,he recovered with the conservative treatments of antibiotics and drainage.This case suggests that appendiceal diverticulitis might be a complication of appendiceal involvement of NF-1,and that it occasionally ruptures in the absence of intense abdominal pain.Clinicians should recognize that NF-1 can cause various abdominal manifestations.
基金supported by Grant-in-Aid for Scientific Research (A) 21255007
文摘The surface water samples were collected in river Dahe and its tributaries, which flow into severely eutrophic lake Dianchi, Yunnan Province, China, in order to elucidate factors controlling water quality fluctuations. The temporal and spatial distribution of water quality tendency was observed. The water quality of each river is dependent on the hydrology effect such water gate and circulating irrigation system. We must consider the hydrology effect to accurately understand water quality variations of river in this study field. In river without highly circulating irrigation system or water gate effect, the downstream nitrate nitrogen （NO3-N） concentration increase occurred in area dominated by open field cultivation, whereas the NO3-N concentration was constant or decreased in area dominated by greenhouse land use. This result suggests that greenhouse covers the soil from precipitation, and nitrate load of greenhouse could be less than that of open field cultivation while the rainfall event. In the upper reaches of river, where is dominated by open field cultivation, there were no sharp increase dissolved molybdate reactive phosphorus and total phosphorus concentration, but P load was accumulated in the lower reaches of river, whose predominant land use is greenhouse. Although the P sources is unclear in this study, greenhouse area may have potential of P loads due to its high P content in greenhouse soil. Considering hydrology effect is necessary to determine what the major factor is influencing the water quality variation, especially in area with highly complicated irrigation system in this studying site.
