Accuracy of apparent diffusion coefficient values for distinguishing between pineal germ cell tumour and pineoblastoma
Issued Date
2023-01-01
Resource Type
ISSN
00099260
eISSN
1365229X
Scopus ID
2-s2.0-85152452360
Pubmed ID
37037704
Journal Title
Clinical Radiology
Rights Holder(s)
SCOPUS
Bibliographic Citation
Clinical Radiology (2023)
Suggested Citation
Panyaping T., Tritanon O., Wisetsathon P., Chansakul T., Pongpitcha P. Accuracy of apparent diffusion coefficient values for distinguishing between pineal germ cell tumour and pineoblastoma. Clinical Radiology (2023). doi:10.1016/j.crad.2023.03.008 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/82514
Title
Accuracy of apparent diffusion coefficient values for distinguishing between pineal germ cell tumour and pineoblastoma
Author's Affiliation
Other Contributor(s)
Abstract
AIM: To differentiate between pineal germ cell tumour and pineoblastoma using apparent diffusion coefficient (ADC) values due to their overlapping imaging findings on magnetic resonance imaging (MRI). MATERIALS AND METHODS: This retrospective study was conducted on 33 patients with pineal germ cell tumours and eight patients with pineoblastoma who underwent pretreatment MRI. Twenty-seven patients (21 with pineal germ cell tumour and six with pineoblastoma) were included for ADC measurement. The minimum and mean ADC values of the tumours were measured, with normalized tumour to control ADC ratios generated. The MRI characteristics of the tumours were evaluated. RESULTS: The mean and minimum ADC values, normalized mean and minimum ADC ratios of pineal germ cell tumours were significantly higher than those of pineoblastomas (all p<0.005). A cut-off value of 0.92 for the normalized mean ADC ratio was used to distinguish between pineal germ cell tumour and pineoblastoma and achieved an area under the curve of 0.95, sensitivity of 90.5%, specificity of 83.3%, and accuracy of 92.6%. An equal degree of contrast enhancement to the adjacent venous sinus was the only MRI characteristic that suggested the diagnosis of pineal germ cell tumour. CONCLUSION: The ADC values could help differentiate between pineal germ cell tumour and pineoblastoma, specifically when conventional MRI findings are indeterminate.