title: Ultrasonographic evaluation of depth-width ratio (D/W) of benign and malignant mammary tumors in dogs.
abstract: Depth-width ratio (D/W) is the only quantitative item in the criteria recommended by the Japanese Ultrasound Society for the evaluation of breast tumors in humans. However, the usefulness of the D/W has not been evaluated in dogs. Eighty-six mammary masses in 34 female dogs underwent ultrasonographic examination to determine the D/W and other characteristics. Results of ultrasonographic and histopathologic examinations were compared. The D/W of malignant tumors was significantly greater than that of benign tumors, and it had a sensitivity of 56.3% and a specificity of 92.9% for the diagnosis of malignancy when the threshold of D/W was 0.7. In addition, irregular margin, polymorphous shape and heterogeneous internal echographic characteristics were correlated with malignancy.
authors.affiliation: Veterinary Medical Center, Department of Clinical Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro, Hokkaido 080-8555, Japan.
authors.forename: Michihito
authors.initials: M
authors.lastname: Tagawa
authors.forename: Eiichi
authors.initials: E
authors.lastname: Kanai
authors.forename: Genya
authors.initials: G
authors.lastname: Shimbo
authors.forename: Mikiya
authors.initials: M
authors.lastname: Kano
authors.forename: Hideki
authors.initials: H
authors.lastname: Kayanuma
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D004285:Dogs; D005260:Female; D015674:Mammary Neoplasms, Animal / Q000000981:diagnostic imaging* / Q000473:pathology; D012680:Sensitivity and Specificity; D016217:Ultrasonography, Mammary / Q000662:veterinary*