M. Shimizu et al., Statistical study for sonographic differential diagnosis of tumorous lesions in the parotid gland, ORAL SURG O, 88(2), 1999, pp. 226-233
Citations number
18
Categorie Soggetti
Dentistry/Oral Surgery & Medicine
Journal title
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS
Objective, The purpose of this study was to clarify characteristic sonomorp
hologic features of parotid lesions statistically and to propose new criter
ia for the differential diagnosis.
Study design. Eighty-six tumorous lesions were analyzed with regard to the
following sonomorphologic features: boundary, shape, echo intensity level,
distribution of internal echoes, and acoustic enhancement. Stepwise polycho
tomous logistic regression analysis was performed to assess characteristic
sonographic features. As dependent variables, we used "pleomorphic adenoma,
" "Warthin tumor," "malignant tumors" and "other benign lesions"; as predic
tor variables, we used the aforementioned sonomorphologic features. Proport
ion of the occurrence of each dependent variable was calculated.
Results. Lobular shape and homogeneous internal echoes predicted pleomorphi
c adenoma. A lesion with multiple anechoic areas would be Warthin tumor wit
h very high sensitivity. Malignant tumors showed either heterogeneous inter
nal echoes without characteristic structures or polygonal shape.
Conclusions. These sonomorphologic features should be observed to make more
exact differential diagnoses for operation and therapy planning.