Ultrasonography of urinary bladder disorders.

Ultrasonography is often recommended as the first diagnostic imaging modality in patients with hematuria or dysuria. It can provide information relative to the capacity of the urinary bladder, changes in bladder outline, changes in wall thickness, identification of mural and luminal masses, and identification of extrinsic lesions that may displace the bladder wall causing changes in its shape. Ultrasonography allows an evaluation of the entire urinary tract (except distal urethra) in both female and male dogs as well as the sublumbar region for lymphadenopathy.