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  • Walter de Gruyter GmbH  (2)
  • 1
    In: Open Medicine, Walter de Gruyter GmbH, Vol. 5, No. 6 ( 2010-12-1), p. 704-711
    Abstract: Acromegaly is associated with an increased prevalence of colonic polyps. The aim of this study was to evaluate the prevalence and recurrence rate of colonic polyps in acromegalic patients. Ninety-six acromegalic patients and 100 irritable bowel syndrome patients (IBS) were enrolled in the study. Twenty patients who were cured exclusively by surgery, and 20 patients that could not be hormonally controlled were re-examined colonoscopically after 36 months. Twenty-nine of 96 acromegalic patients (30.2%) had colonic polyps. In the IBS group, 10 (10.0%) had colonic polyps. The prevalence of colonic polyps was significantly higher in acromegaly. The group of acromegalic patients with and without polyps did not differ significantly with regard to plasma GH, IGF-I, fasting insulin levels and glycemic status. The presence of colonic polyps was correlated with increased patient age and male gender. We did not observe a difference in terms of polyp recurrence frequencies in the patients cured by surgery compared to uncontrolled patients. Acromegalic patients have a higher prevalence of colonic polyps than that of control subjects. We could not identify any factors that could predict polyps within the acromegalic patients - but age and male sex.
    Type of Medium: Online Resource
    ISSN: 2391-5463
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2010
    detail.hit.zdb_id: 2829380-0
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  • 2
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2016
    In:  Clinical Chemistry and Laboratory Medicine (CCLM) Vol. 54, No. 5 ( 2016-01-1)
    In: Clinical Chemistry and Laboratory Medicine (CCLM), Walter de Gruyter GmbH, Vol. 54, No. 5 ( 2016-01-1)
    Abstract: Most of the factors causing preanalytical and analytical variation in ammonia measurement have been identified. Biological variation data for ammonia is still lacking. We therefore estimated the components of biological variation (within-subject=CV Methods: Blood samples from 20 healthy subjects were collected in K2EDTA tubes daily over a period of 4 consecutive days from each subject. Each plasma sample was split into two aliquots; one was immediately analyzed as the samples were collected and the other was stored –80 °C until testing at the end of the collection period and analyzed at once in one analytical run. All samples were analyzed in duplicate. Estimations were calculated according to Fraser and Harris methods. Results: CV Conclusions: The present study for the first time described the components of biological variation for ammonia in healthy individuals. These data regarding biological variation of ammonia could be useful for a better evaluation of ammonia test results in clinical interpretation and for determining quality specifications based on biological variation.
    Type of Medium: Online Resource
    ISSN: 1437-4331 , 1434-6621
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 1492732-9
    SSG: 15,3
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