z-logo
open-access-imgOpen Access
Computed tomography and magnetic resonance imaging findings in dogs with vaginal leiomyoma and leiomyosarcoma
Author(s) -
Tanaka Toshiyuki,
Noguchi Shunsuke,
Wada Yusuke,
Yamazaki Hiroki,
Nishida Hidetaka,
Akiyoshi Hideo
Publication year - 2022
Publication title -
veterinary medicine and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 11
ISSN - 2053-1095
DOI - 10.1002/vms3.930
Subject(s) - medicine , leiomyosarcoma , magnetic resonance imaging , lesion , radiology , leiomyoma , pathology
Background In humans, magnetic resonance imaging (MRI) is preferred over computed tomography (CT) for the assessment of pelvic lesions. Although CT findings of several pelvic tumours have been reported in veterinary medicine, MRI findings are limited. Objectives The purpose of this study was to retrospectively compare the CT and MRI findings in dogs with vaginal leiomyoma and leiomyosarcoma. Methods This retrospective study of five dogs compared the CT and MRI findings of intrapelvic lesions, including vaginal leiomyoma ( n  = 4) and leiomyosarcoma ( n  = 1). No invasion of the surrounding tissue was detected on histopathological examination. In this retrospective study, the following parameters of CT and MRI were recorded for each dog: the border between the lesion and the adjacent pelvic organs, including the prostate, rectum or urethra; signal intensity (SI) of the lesion; enhancement pattern; presence of haemorrhage; necrosis or cystic areas and lymphadenopathy. Because SI on MRI is affected by cell density, tumour cell density was analysed using a microscope slide. Results In vaginal leiomyoma, the border between the lesion and the surrounding pelvic organ tends to be clearer on MRI than on CT. In vaginal leiomyosarcoma, the border was comparable between MRI and CT. Each lesion showed heterogeneous enhancement on CT and MRI scans. In each lesion, the assessment of haemorrhage, necrosis, cystic areas and lymphadenopathy was comparable between MRI and CT. The SI of the lesion on T2WI of the vaginal leiomyoma and leiomyosarcoma were hyperintense in four cases (4/4; 100%) and mixed intense in one case (1/1; 100%), respectively. The cell density of leiomyosarcoma is higher than that of leiomyomas. Conclusions The SI on T2WI may be useful for differentiating leiomyoma from leiomyosarcoma. MRI may be useful to differentiate vaginal leiomyomas from leiomyosarcomas and evaluate margins.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here