Long‐term treatment with allergoid immunotherapy with Parietaria. Clinical and immunologic effects in a randomized, controlled trial

BACKGROUND: Specific immunotherapy (SIT) is a valuable treatment for respiratory allergy, and the use of chemically modified allergens (allergoids) has improved its safety, as testified by several studies. We evaluated the effects of a SIT course with an allergoid extract of Parietaria pollen in a double-blind, placebo-controlled trial. METHODS: The study was double-blind in the first year; then it was prolonged up to 3 years with all patients on active treatment. Clinical effectiveness, safety, skin reactivity, systemic immunologic parameters, and subjective assessment were evaluated. We also had available a self-evaluation recorded in a follow-up visit 4 years after the discontinuation of SIT. RESULTS: A significant reduction of the symptoms plus drug intake scores during the pollen seasons was observed in the patients receiving active SIT. The placebo patients, after switching to active SIT, also showed significant clinical improvement. The clinical efficacy persisted during years 2 and 3 of treatment. After year 1, the actively treated patients reported a significant subjective improvement (frequency of symptoms, P = 0.001; duration of symptoms, P = 0.024; physical performance, P = 0.043) compared with the placebo group. The self-evaluation by visual analog scale showed that all patients maintained a significant clinical improvement up to 4 years after discontinuing SIT (year 1: active=+31.6%, placebo=-15.7%; year 7: active=+35.8%, placebo=+31.3%). The systemic immunologic changes after active SIT paralleled those described elsewhere (IgE decreased from 22 to 9 and from 21 to 8 IU/ml; IgG4 increased from 43 to 87 and from 18 to 60 IU/ml). A significant decrease in skin reactivity to three different allergen concentrations was observed at year 3 compared with pretreatment values (P<0.05). CONCLUSIONS: The investigational SIT with Parietaria appeared to be effective and safe; a 3-year course of treatment achieved a long-lasting efficacy.     

食管癌的诊断和治疗

1诊断 1.1普查由于食管早期癌的疗效明显好于进展期癌,加之,内镜下食管粘膜切除术用于无淋巴结转移的表浅食管癌的根治已取得良好疗效,并已逐渐被医患双方所接受,因而普查仍是目前改善食管癌(EC)疗效的肯定手段.我国北方尤其是太行山地区及伊朗里海沿岸居民、有头颈癌肿史者是EC的高发人群.     

Implementation of an image-guided radiation therapy program: Lessons learnt and future challenges

The aim of this paper is to detail the experience obtained in implementing an image-guided radiation therapy program at the Northern Sydney Cancer Centre. This required retrofitting a Varian Clinac 21EX with an on-board imager. The commissioning and quality assurance procedures, organisation of a multidisciplinary image guided radiation therapy group, and the development of clinical protocols for orthogonal kV and cone beam computed tomography implementation are described. Reassessment of the image-guided radiation therapy program has continued as new equipment and software versions were made available in the department.     

Production of interleukins 4 and 10 in children with hepatic involvement in the course of Toxocara spp. infection

Toxocara spp. infestations present with a wide spectrum of symptoms, from general inflammation of internal organs with eosinophilic granuloma formulation through ocular or brain involvement. There is also an asymptomatic form. The known factors that influence the clinical form of the disease are the intensity of the infestation, the localization of the larvae, the age of the patient, the efficiency of the immune system and the history of reinfection. The aim of our study was to evaluate the production of interleukins 4 (IL‐4) and 10 (IL‐10) in children in the course of Toxocara spp. infections with hepatic involvement. The analysis of peripheral leucocytes, eosinophils, immunoglobulin E, and IL‐4 and IL‐10 concentrations presented significantly higher values in children with radiologically confirmed liver granuloma than in uncomplicated hepatomegaly. Based on statistical analysis, we confirmed the IL‐4/IL‐10 ratio variation in the analysed groups: patients with liver lesions showed a ratio of <1, while children without granulomas had a ratio of >2. The relevant analysis confirmed a positive statistical correlation in both seropositive groups for IgE and IL‐4, and only in the granuloma group for IgE and IL‐10.     

Position paper on the development of a middle level provider in nuclear medicine: the nuclear medicine practitioner

The development of an educational program and credentialing structure to support and recognize an advanced level of the practice of nuclear medicine technology is now underway. This work parallels the efforts in many, if not most, health care disciplines as they seek to achieve the twin goals of developing enhanced career paths and providing the best possible patient care in an environment where science and technology can run roughshod over concepts taught in the classroom a mere decade ago. Education is key to both goals. A master's level degree in nuclear medicine technology, coupled with an advanced practice credential recognizing both the educational achievement and a level of clinical expertise, will give nuclear medicine practitioners the knowledge and the right to practice their profession at a high level of autonomy, leading to more efficient and higher quality health care services. To that end the following position paper was prepared by members of the Advance Practice Task Force of the SNMTS and presented to the SNMTS Executive Council and the SNM Board of Directors. In June 2005, the executive council and the board of directors approved a resolution supporting the establishment of a middle level provider in nuclear medicine known as the nuclear medicine practitioner.     

Western Australian cigarette smokers have fewer small lung nodules than North Americans on CT screening for lung cancer

To determine the prevalence of small lung nodules on low‐dose helical computed tomography (CT) in a Western Australian cohort of asymptomatic long‐term cigarette smokers and to compare this with a large, similarly derived cohort of North Americans from the Mayo Clinic Lung Cancer Screening Trial. Forty‐nine asymptomatic long‐term cigarette smokers of minimum age 50 years underwent a low‐dose 64‐slice helical CT of the lungs. Images were viewed on a soft copy reporting station with thin section axial and coronal images, maximum intensity projection images, and advanced image manipulation tools. The prevalence of all nodules was 39%, significantly lower than the Mayo Clinic cohort prevalence of 51% (P < 0.01, Fisher's exact test), despite the use of more advanced imaging technology and image manipulation designed to increase the sensitivity for nodules. The prevalence of small nodules in asymptomatic long‐term cigarette smokers in Western Australia is high, though significantly less than that found in a large study in North America. The authors postulate this is due to the relatively low rates of mycobacterium tuberculosis and soil‐derived fungal pulmonary infections in Western Australia, as well as a lower degree of urban air pollution.