MRI findings, including diffusion-weighted imaging, in seven cats with nasal lymphoma and two cats with nasal adenocarcinoma
| Autor: | Kazuna Ashida, Yasumasa Iimori, Toshiyuki Tanaka, Hiroki Yamazaki, Hideo Akiyoshi, Keiichiro Mie, Hidetaka Nishida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Pathology
medicine.medical_specialty Lymphoma 040301 veterinary sciences Adenocarcinoma Cat Diseases 030218 nuclear medicine & medical imaging 0403 veterinary science 03 medical and health sciences 0302 clinical medicine Biopsy Animals Medicine Effective diffusion coefficient Small Animals Retrospective Studies CATS medicine.diagnostic_test business.industry 04 agricultural and veterinary sciences medicine.disease Magnetic Resonance Imaging Diffusion Magnetic Resonance Imaging Cats business Mri findings Diffusion MRI |
| Zdroj: | Journal of feline medicine and surgery. 23(4):393-399 |
| Popis: | Objectives Primary nasal tumours in cats are rare, with lymphoma being the most common feline nasal tumour, followed by adenocarcinoma. Although CT can reliably detect feline nasal tumours, there are no specific CT features that identify each tumour type. To our knowledge, there have been no reports describing MRI findings, including diffusion-weighted imaging (DWI), for nasal lymphomas and adenocarcinomas in cats. Therefore, this retrospective study aimed to evaluate the MRI findings of nasal lymphoma and adenocarcinoma, including qualitative and quantitative analysis of DWI. Methods MRI examination was performed on seven cats with histologically confirmed lymphoma and on two with adenocarcinoma. The MRI protocol included T2-weighted imaging (T2WI), T1-weighted imaging (T1WI) and DWI. Apparent diffusion coefficient (ADC) values were measured using DWI. Contrast agent was not used in one cat with lymphoma. Results Of the cats with lymphoma, three (43%) were iso- and hyperintense on T2WI, seven (100%) were isointense on T1WI, five (83%) exhibited mild heterogeneous enhancement, including a prominent region of non-enhancement on post-contrast T1WI, and seven (100%) cats exhibited hyperintensity on DWI. The median ADC values were 0.45 × 10−3 mm2/s (range 0.37–0.53 × 10−3 mm2/s). For adenocarcinoma, two (100%) were iso- and hyperintense on T2WI, two (100%) were isointense on T1WI, two (100%) exhibited marked heterogeneous enhancement on post-contrast T1WI and two (100%) were isointense on DWI. The median ADC values were 1.08 × 10−3 mm2/s (range 0.88–1.27 × 10−3 mm2/s). The median ADC values of lymphoma tended to be lower than adenocarcinoma ( P = 0.056). Conclusions and relevance Determining ADC value and tumours with a large area of non-enhancement may be helpful in differentiating nasal lymphoma from nasal adenocarcinoma. |
| Databáze: | OpenAIRE |
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