Home  About us  Contact
 

Microscopic Hematuria (microscopic + hematuria)

Distribution by Scientific Domains
Medical Sciences100%

Kinds of Microscopic Hematuria

  • asymptomatic microscopic hematuria
    		•

    Selected Abstracts

    Microscopic hematuria as a screening marker for urinary tract malignancies

    INTERNATIONAL JOURNAL OF UROLOGY, Issue 1 2001
    Kazunobu Sugimura
    Abstract Background: Although a mass screening urinalysis is a widely accepted procedure, it has not yet been shown if microhematuria is an appropriate and useful screening marker for urologic malignancies. Methods: (1) The incidence of hematuria was studied in 113 patients with renal cell carcinoma (RCC), 185 with bladder carcinoma and 51 with renal pelvic or ureteral carcinoma. The association of the T stage with the intensity of hematuria in each malignancy was also examined. (2) In 823 asymptomatic adults with microhematuria, the prevalence of these malignancies was studied retrospectively to find the positive predictive value (PPV). Results: (1) The incidence of hematuria was 35% for RCC, including gross and microhematuria. Advanced RCC (T3 and T4) were diagnosed more frequently in the gross hematuria group than in the microhematuria and no hematuria groups. In contrast, the incidence of hematuria was 94% for urothelial carcinomas either in the upper urinary tract or in the bladder. There was no significant difference in the T stage nor grade between the gross hematuria group and the microhematuria group. (2) Regarding asymptomatic microhematuria, the PPV was 1.7% (14 cases) for bladder carcinoma, 0.4% (3 cases) for ureteral/renal pelvic carcinoma and 0.2% (2 cases) for RCC. In men aged 50 years or older, PPV was 6.2% for urothelial carcinomas. In 14 cases of bladder carcinoma, 3 cases showed muscle invasion. Conclusions: Microhematuria is an appropriate screening marker for urothelial carcinomas, particularly in elderly men, but not for RCC. However, it is unlikely that a mass screening urinalysis using a single voided urine sample would contribute to earlier detection of bladder carcinoma. [source]

    Incidence and growth pattern of simple cysts of the kidney in patients with asymptomatic microscopic hematuria

    INTERNATIONAL JOURNAL OF UROLOGY, Issue 2 2003
    KEN MARUMO
    AbstractBackground: We examined the incidence and natural history of simple renal cysts found by ultrasonography (US) in patients referred for asymptomatic microscopic hematuria. Methods: Among the 906 patients aged 18,78 years, 743 patients who had undergone US were included in the present study. The natural history of simple renal cysts was investigated in 55 patients who underwent periodical US examinations for more than 3 years. Results: The incidence of simple renal cysts was 4.3% for ages 29 years or younger, 15.3% for ages 30,39, 21.8% for ages 40,49, 23.3% for ages 50,59 and 32.6% for ages 60 years or older; thus the incidence increased in older age groups (P = 0.0005 for men, P = 0.0020 for women). Men tended to have a higher incidence than women. The degree of hematuria did not influence the incidence of renal cysts (P = 0.9044). The annual growth rate of the mean maximum diameter was 4.2% during a 3-year follow-up period in 55 patients and 5.1% during a 6-year follow-up in 31 patients. Conclusion: Since the diameter of a renal cyst may increase by 5% annually, the diameter of the cyst may increase by 1.6 times in 10 years. The scheduling of follow-up examinations depends on the size at the time of disclosure, the effects on calyceal systems, or the suspicion of a concurrent malignant disease. However, the most simple renal cysts may be followed-up at an interval of more than 10 years, once a diagnosis has been established. [source]

    Significance and diagnostic accuracy of renal calculi found by ultrasonography in patients with asymptomatic microscopic hematuria

    INTERNATIONAL JOURNAL OF UROLOGY, Issue 7 2002
    Ken Marumo
    Abstract Background : The purpose of the present study was to evaluate the clinical significance and the accuracy of the diagnosis of renal calculi incidentally found by ultrasonography (US). Methods : A total of 906 subjects (639 men and 267 women) aged 18,78 years were referred for asymptomatic microscopic hematuria. Of these, 743 patients who underwent US were studied. Results : Hyperechogenic spots in the central echo complex suggesting renal calculi were noted in 195 patients (21.5%). The occurrence of hyperechogenic spots was higher in patients with 20 or more urinary red blood cells per high-power field (,2 = 4.896, P = 0.0269) and in men than in women (,2 = 7.101, P = 0.0077), but it was lowest in patients who were 29 years old or younger. Of these 195 patients, who were followed up for 1,161 months (average: 33.5 months), 24 patients (12.3%) needed urological management. Extracorporeal shockwave lithotripsy was carried out in eight patients, transureteral lithotripsy was carried out in three patients, spontaneous passage occurred in 11 patients and medication for hyperuricemia was initiated in two patients (1%). Among the patients in whom hyperechogenic spots were found in the kidney by US but calculi were not visible on abdominal plain radiographs, 39 patients underwent computed tomography. Of them, 31 patients were confirmed to have renal calculi. Conclusion : The obtained results suggest that US is an effective and reliable means of detecting renal calculi in patients with asymptomatic microscopic hematuria, and in facilitating prompt urological intervention or predicting the natural course of renal calculi. [source]

    Prediction of diagnosis of immunoglobulin a nephropathy prior to renal biopsy and correlation with urinary sediment findings and prognostic grading

    JOURNAL OF CLINICAL LABORATORY ANALYSIS, Issue 2 2008
    Kazutaka Nakayama
    Abstract Several clinical markers correlate well with the diagnosis and prognosis of IgA nephropathy (IgAN). In the present study, we re-evaluated the usefulness of these four clinical markers for prediction of the diagnosis of patients with IgAN through a comparison between many more patients with IgAN and those with other types of renal diseases. 364 patients with IgAN and 289 with other types of renal disease were examined. An analysis was performed prior to renal biopsy, using clinical markers including, serum IgA, serum IgA/C3 ratio, number of red blood cells in urinary sediments, and urinary protein. Patients with IgAN were divided into four groups according to histopathological findings. Presence of microscopic hematuria, persistent proteinuria, high serum IgA levels, and the serum IgA/C3 ratios are useful for prediction of diagnosis of IgAN and distinguishing it from other renal diseases. Blood pressure, urinary protein, serum uric acid, renal function, and urinary sediment findings may be useful for prediction of prognostic grading in patients with IgAN. J. Clin. Lab. Anal. 22:114,118, 2008. © 2008 Wiley-Liss, Inc. [source]

    Does Hematuria Contraindicate Kidney Donation?

    AMERICAN JOURNAL OF TRANSPLANTATION, Issue 7 2010
    B. J. Nankivell
    Whether to use kidneys from donors with asymptomatic microscopic hematuria necessitates a thoughtful nephrological approach. See article by Kido et al on page 1597. [source]