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Incidence and Growth Pattern of Simple Cysts of the Kidney in Patients with Asymptomatic Microscopic Hematuria by KEN MARUMO; YUTAKA HORIGUCHI; KEN NAKAGAWA; MOTOTSUGU OYA; TAKASHI OHIGASHI; HIROTAKA ASAKURA; JUN NAKASHIMA; MASARU MURAI is a Medicine article available to read on EtoBox.
What is Incidence and Growth Pattern of Simple Cysts of the Kidney in Patients with Asymptomatic Microscopic Hematuria about?
**Abstract****__Background:__** 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.
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- Author
- KEN MARUMO; YUTAKA HORIGUCHI; KEN NAKAGAWA; MOTOTSUGU OYA; TAKASHI OHIGASHI; HIROTAKA ASAKURA; JUN NAKASHIMA; MASARU MURAI
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0919-8172)
- Published
- 2003
- Language
- EN
- Field
- Medicine (Health Sciences)