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Hippocampal volumes in patients exposed to low-dose radiation to the basal brain. A case--control study in long-term survivors from cancer in the head and neck region.

Artikel i vetenskaplig tidskrift
Författare Erik Olsson
Carl Eckerström
Gertrud Berg
Magnus Borga
Sven Ekholm
Gudmundur Johannsson
Susanne Ribbelin
Göran Starck
Anna Wysocka
Elisabet Löfdahl
Helge Malmgren
Publicerad i Radiation oncology (London, England)
Volym 7
Nummer/häfte 1
Sidor 202
ISSN 1748-717X
Publiceringsår 2012
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för radiofysik
Institutionen för kliniska vetenskaper, Avdelningen för onkologi
Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi
Institutionen för kliniska vetenskaper, Avdelningen för radiologi
Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition
Institutionen för filosofi, lingvistik och vetenskapsteori
Sidor 202
Språk en
Länkar dx.doi.org/10.1186/1748-717X-7-202
Ämnesord Head and neck cancer, radiation therapy, hippocampus, volumetry
Ämneskategorier Cancer och onkologi, Radiologi, Strålningsbiologi


ABSTRACT: BACKGROUND: An earlier study from our group of long time survivors of head and neck cancer who had received a low radiation dose to the hypothalamic-pituitary region, with no signs of recurrence or pituitary dysfunction, had their quality of life (QoL) compromised as compared with matched healthy controls. Hippocampal changes have been shown to accompany several psychiatric conditions and the aim of the present study was to test whether the patients' lowered QoL was coupled to a reduction in hippocampal volume. METHODS: Patients (11 men and 4 women, age 31--65) treated for head and neck cancer 4--10 years earlier and with no sign of recurrence or pituitary dysfunction, and 15 matched controls were included. The estimated radiation doses to the basal brain including the hippocampus (1.5 -- 9.3 Gy) had been calculated in the earlier study. The hippocampal volumetry was done on coronal sections from a 1.5 T MRI scanner. Measurements were done by two independent raters, blinded to patients and controls, using a custom method for computer assisted manual segmentation. The volumes were normalized for intracranial volume which was also measured manually. The paired t test and Wilcoxon's signed rank test were used for the main statistical analysis. RESULTS: There was no significant difference with respect to left, right or total hippocampal volume between patients and controls. All mean differences were close to zero, and the two-tailed 95% confidence interval for the difference in total, normalized volume does not include a larger than 8% deficit in the patients. CONCLUSION: The study gives solid evidence against the hypothesis that the patients' lowered quality of life was due to a major reduction of hippocampal volume.

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