The role of ultrasonography in the evaluation of XXXX .

@entity1 @entity459 @entity1373 @entity8611 @entity1188 @entity3243 @entity652 @entity1374
Ultrasonography was used preoperatively in 21 @entity1 with @entity459 in an effort to locate enlarged parathyroid glands. It indicated the presence of a solitary mass compatible with a @entity3243 in 14 @entity1 . At operation, @entity652 were found at the location indicated by ultrasonography in 13 of the 14 @entity1 (93 per cent). In seven @entity1 , ultrasonography failed to reveal evidence of a mass of the parathyroid gland. At operation, three had @entity8611 and four had a solitary @entity652 . Of the four @entity1 with @entity652 undetected by ultrasonography, one @entity1 had an @entity652 which had undergone @entity1188 and three had coexisting nodular @entity1374 . We concluded that ultrasonography is valuable in the preoperative assessment of @entity1 with @entity459 . This is especially so in the absence of coexisting nodular @entity1374 . When positive, ultrasonography accurately locates @entity652 , and when negative, it strongly suggests the presence of @entity1373 . This may have clinical application in limiting the extent of dissection and, thereby, reducing the morbidity of parathyroid gland exploration.
