Autoimmune gastropathy in type 1 diabetic patients with parietal cell antibodies: histological and clinical findings

OBJECTIVE: Approximately 15-20% of type 1 diabetic patients exhibit parietal cell antibodies (PCAs) targeting gastric H+/K+ATPase. We examined whether iron deficiency anemia, pernicious anemia, and autoimmune gastritis, which may predispose to gastric tumors, were more frequent in PCA+ than in PCA- patients. RESEARCH DESIGN AND METHODS: Gastric biopsies from 88 consecutively recruited type 1 diabetic patients (51 men and 37 women, 47 PCA+ and 41 PCA-, aged 42 +/- 13 years) were evaluated using the updated Sydney system. Immunostaining was done for parietal cells, B- and T-cells, enterochromaffin-like (ECL) cells, and Helicobacter pylori (HP). PCAs were assayed by indirect immunofluorescence, H+/K+ATPase antibodies by enzyme immunoassay, and HP by serology, urea breath test, and histology. Pentagastrin tests were performed in 42 subjects. RESULTS: Autoimmune gastritis (AG) was present in 57% of PCA+ and 10% of PCA- cases (OR 12.5, P < 0.0001). PCA positivity (beta = 1.44; P = 0.04) and hypergastrinemia (beta = 0.01; P = 0.026), but not HP, age, diabetes duration, sex, and HLA-DQ type were risk factors for AG. Iron deficiency anemia (OR 3.9, P = 0.015), pernicious anemia (OR = 4.6, P = 0.022), and hypochlorhydria (OR = 20.0, P = 0.0002) were more frequent in AG+ individuals. HP infection was present in 47 patients but did not influence corpus histology or gastrinemia. (Pre)malignant lesions were found in 26% of PCA+ subjects: ECL cell hyperplasia in 7 AG+ patients, comprising 1 with a gastric carcinoid tumor, and corpus intestinal metaplasia in 11 AG+ patients, including 1 with linitis plastica. CONCLUSIONS: PCA+ type 1 diabetic patients should be screened for autoimmune gastritis, iron deficiency, and pernicious anemia. Particularly hypergastrinemic PCA+ patients with autoimmune gastritis are at increased risk for (pre)malignant gastric lesions.     

Increasing incidence of advanced stage head and neck tumours

The aim of this study was to determine whether the incidence of advanced stage (T4) head and neck tumours has increased. We analysed retrospectively 3178 patients diagnosed with oral, pharyngeal or laryngeal cancer in the period 1980-2000 at the University Medical Center Utrecht (UMCU), The Netherlands. There was a statistically significant increase in the proportion of T4 head and neck tumours compared with non-T4 tumours over the period 1980-2000. Linear regression analysis estimated an increase of 0.9% every year. The observed increase in T4 tumours at UMCU shows up in figures from the Netherlands Regional Cancer Registry (IKMN) and the National Cancer Registration (NCR). Although these bodies report for fewer years, this finding refutes the possibility of selected referral to the University Medical Center Utrecht. In conclusion, the number of head and neck cancer patients presenting with an advanced stage carcinoma (T4) has increased over a period of 21 years.     

Elderly patients with head and neck cancer: short-term effects of surgical treatment on quality of life

Elderly patients with head and neck cancer are less likely to be treated surgically. However, little is known about surgical outcome and quality of life (QOL) in elderly patients after a major surgery. This prospective study compared the QOL and the surgical outcome of 54 elderly (> or =70 years) and 75 younger patients (45-60 years) with carcinoma of the oral cavity (stage > or = II), pharynx (stage > or = II) or larynx (stage > or = III). Before and 3 months after surgery, the patients completed questionnaires about QOL (EORTC QLQ-C30 and QLQ-H&N35) and depression (CES-D). Before treatment, elderly and younger patients did not differ in QOL. Three months after the treatment, both groups scored worse on most QOL aspects, but there were no significant differences between the elderly and the younger patients. Surgical and systemic complication rates were similar for both the groups. In conclusion, we found no significant differences in the complication rate and QOL aspects between surgically treated elderly and younger patients.     

Alternative voice after laryngectomy using a sound-producing voice prosthesis

OBJECTIVE: To improve the voice quality of female laryngectomees and/or laryngectomees with a hypotonic pharyngoesophageal (PE) segment by means of a pneumatic artificial source of voice incorporated in a regular tracheoesophageal (TE) shunt valve. STUDY DESIGN: Experimental, randomized, crossover trial. METHODS: The new sound source consists of a single silicone lip, which performs an oscillatory movement driven by expired pulmonary air flowing along the outward-striking lip through the TE shunt valve. A prototype of this pneumatic sound source is evaluated in vitro and in six laryngectomees. In vivo evaluation includes speech rate, maximal phonation time, perceptual voice evaluation of read-aloud prose by an expert listener, speech intelligibility measurements with 12 listeners, and self-assessment by the patients. Moreover, extensive acoustical and aerodynamic in vivo registrations are performed using a newly developed data acquisition system. RESULTS: The current prototype seems beneficial in female laryngectomees with a hypotonic PE segment only. For them the sound-producing voice prosthesis improves voice quality and increases the average pitch of voice, without decreasing intelligibility or necessitating other pressure and airflow rates than regular TE shunt speech. Pitch regulation of this prosthetic voice is possible, yet limited. CONCLUSIONS: The mechanism is feasible and does not result in unacceptable airflow resistance. For this new mechanism of alaryngeal voice to become an established technique for postlaryngectomy voice restoration, a voice suitably pitched for male laryngectomees has to be generated and a large part of the melodic and dynamic range of the sound source has to be attainable within physiological airflow rates.     

Long-term quality of life of patients with head and neck cancer

Objectives: To describe prospectively the long‐term changes of quality of life and mood in patients with squamous cell carcinoma of the head and neck treated with surgery and/or radiotherapy. Patients and Methods: One hundred seven patients completed the European Organization for Research and Treatment of Cancer (EORTC) Core Questionnaire, the EORTC Head and Neck Cancer Module, and the Center for Epidemiological Studies Depression Scale before treatment, and 6, 12, 24, and 36 months later. Results: There was limited deterioration of physical and role functioning and of many head and neck symptoms at 6 months, with improvement thereafter. After 36 months only physical functioning, taste/smell, dry mouth, and sticky saliva were significantly worse, compared with baseline. Female sex, higher cancer stage, and combination treatment were associated with more symptoms and worse functioning. Despite physical deterioration, there was a gradual improvement of depressive symptomatology and global quality of life. Conclusion: Treatment for head and neck cancer results in short‐term morbidity, most of which resolves within 1 year. Despite an initially high level of depressive symptomatology, there is gradual improvement of psychological functioning and global quality of life over the course of 3 years. In this prospective study, the impact of the disease and its treatment in long‐term survivors seems to be less severe than it is often assumed to be.     

Quality of life and functional status in patients with cancer of the oral cavity and oropharynx: pretreatment values of a prospective study

We assessed the pretreatment health-related quality of life (HRQOL) and functional status of patients with advanced oral and oropharyngeal cancer. Eighty patients were investigated. HRQOL was assessed by EORTC QLQ-C30/QLQ-H&N35 questionnaires. Functional status assessment comprised speech and oral function tests. The results revealed a wide range of HRQOL and functional deficits before treatment. HRQOL appeared to be related to some extent to tumor site (patients with oral tumors reported more pain compared to patients with oropharyngeal tumors) and tumor classification (patients with T3-T4 tumors reported more trouble opening the mouth and felt more ill compared to patients with T2 tumors). Comorbidity appeared to have a major impact. Patients with comorbidity had significantly worse scores on several scales/items on both the EORTC questionnaires. Functional deficits were related to tumor site, classification and comorbidity. Patients with oral cavity tumors (versus oropharyngeal tumors), patients with T3-T4 tumors (versus T2 tumors), and patients with comorbidity (versus without comorbidity) scored significantly worse on several speech and oral function tests. Impaired speech and oral function appeared to be clearly related to global quality of life (QLQ-C30) and self-reported speech (QLQ-H&N35). Many patients with advanced oral and oropharyngeal cancer have compromised HRQOL and functional status before the start of treatment. In addition to tumor site and tumor classification, comorbidity appears to have a major impact on HRQOL and functional status. Knowledge of pretreatment HRQOL and functional status levels is useful for better understanding the impact of treatment on these outcomes over time.     

Lipid and lipoprotein changes after long-term weight reduction: the influence of gender and body fat distribution.

This study was designed: 1) to evaluate the effect of weight loss on body fat distribution, 2) to determine whether indices of body fat distribution can be considered as a prognostic indicator for the ability to lose weight and 3) to evaluate whether a change of body fat distribution is associated with changes in plasma glucose, lipids and lipoproteins in both sexes in order to evaluate a gender difference.

63 obese subjects (41 women and 22 men) were treated on an outpatient basis with an energy-reduced, protein-enriched low calorie diet (3150-4200 kJ/day) for a 6-month period. They were divided in different groups according to gender and body fat distribution using the waist-to-hip circumference ratio.

Body fat topography can be altered by dieting, but not by more than it increases when a person gains weight. Body fat distribution seems to be a significant prognostic indicator for the ability to lose weight in women but not in men. Although body weight and the waist-to-hip circumference decreased significantly, no relationships were found between percent decrease in these parameters and percent changes in plasma glucose, lipids and lipoproteins.

We conclude that an important caloric deficit may lead to a series of metabolic improvements but that gender and the type of fat distribution are important confounding factors in the prediction of metabolic success.     

Assessing the impacts of livestock production on biodiversity in rangeland ecosystems

Biodiversity in rangelands is decreasing, due to intense utilization for livestock production and conversion of rangeland into cropland; yet the outlook of rangeland biodiversity has not been considered in view of future global demand for food. Here we assess the impact of future livestock production on the global rangelands area and their biodiversity. First we formalized existing knowledge about livestock grazing impacts on biodiversity, expressed in mean species abundance (MSA) of the original rangeland native species assemblages, through metaanalysis of peer-reviewed literature. MSA values, ranging from 1 in natural rangelands to 0.3 in man-made grasslands, were entered in the IMAGE-GLOBIO model. This model was used to assess the impact of change in food demand and livestock production on future rangeland biodiversity. The model revealed remarkable regional variation in impact on rangeland area and MSA between two agricultural production scenarios. The area of used rangelands slightly increases globally between 2000 and 2050 in the baseline scenario and reduces under a scenario of enhanced uptake of resource-efficient production technologies increasing production [high levels of agricultural knowledge, science, and technology (high-AKST)], particularly in Africa. Both scenarios suggest a global decrease in MSA for rangelands until 2050. The contribution of livestock grazing to MSA loss is, however, expected to diminish after 2030, in particular in Africa under the high-AKST scenario. Policies fostering agricultural intensification can reduce the overall pressure on rangeland biodiversity, but additional measures, addressing factors such as climate change and infrastructural development, are necessary to totally halt biodiversity loss.     

The significance of accurate dielectric tissue data for hyperthermia treatment planning

For hyperthermia treatment planning, dielectric properties of several tissue types are required. Since it is difficult to perform patient specific dielectric imaging, default values based on literature data are used. However, these show a large spread (50%). Consequently, it is important to know what limit this spread imposes on the accuracy of the SAR and subsequently on the temperature distributions. Hyperthermia treatment plans performed with different values for the dielectric properties were compared. This showed that a spread of 50% resulted in the average absolute difference of 20% in both SAR and temperature distributions (heat sink approach) for regional hyperthermia. For interstitial hyperthermia, a spread of 25% resulted in the averaged absolute difference of 10% in the SAR distributions and 5% in the temperature distributions (heat sink approach). Considering other problems that hamper hyperthermia treatment planning, it can be concluded that default values for the dielectric properties suffice.