A great deal of methods were used to evaluate the urinary tract in patients with myelodysplasia; however, the authors failed to find an informative and easy-to-use diagnostic approach. In the authors' opinion, a simple, available, non-invasive, and safe screening that includes ultrasonography of the bladder and kidneys before and after attempted urination, visualization of urination, squeezing-out test, and general urinalysis should form a basis for diagnosis. The pattern of urination, enuresis, urinary tract infection, obstructive uropathies, the volume of residual urine, the thickness of the detrusor urinae are the basic parameters identified at primary diagnosis. The presence of residual urine serves as a basis for further examination, involving cystography and urodynamic study occasionally supplemented by excretory urography and other techniques.