The 10-Year Natural History of Simple Renal Cysts

Terada, Naoki; Arai, Yoichi; Kinukawa, Naoko; Terai, Akito

doi:10.1016/j.urology.2007.07.075

Cited by 100 publications

(109 citation statements)

References 15 publications

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“…renal neoplasms originating from the renal cyst [4] . These studies indicated that neither the actual size nor size changes were specific to the development of a renal neoplasm.…”

Section: Resultsmentioning

confidence: 99%

“…Our study using CT imaging of the kidney region might provide a more standard imaging protocol to measure renal cyst outcomes. More recent data by Terada et al [4] demonstrated that only cyst shape was found to be an independent predictor of aggressive cyst growth, with linear regression analysis. This study determined that only initial cyst size was an independent predictor for aggressiveness.…”

Section: Discussionmentioning

confidence: 97%

“…There is an increase in the size and number of cysts over time in cyst-bearing individuals. Previous longterm follow-up data have shown that, simple renal cysts continue to increase in size with age > 10 years, and sometimes increase rapidly, particularly in younger patients [4] . However, this study also showed decreased growth rate of cysts with increased age.…”

mentioning

confidence: 95%

“…However, given the retrospective nature of these studies, the associations could be coincidental. The only persistent confounder among all reported associations was increasing age [4,7,8] . Therefore, we analyzed the discrepancy of an increasing rate of simple renal cysts according to initial size, location, and exophytic index stratified using the RENAL nephrometry scoring system in this study.…”

Section: Introductionmentioning

confidence: 99%

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The Growth of Renal Cysts According to the Exophytic Index of the RENAL Nephrometry Scoring System

Park

Kang

2016

Journal of Nephrology Research

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higher than mild and moderate exophytic renal cyst. INTRODUCTIONRenal cysts are acquired lesions that most commonly affect the elderly population [1] . Autopsy studies have reported a 50% incidence of renal cysts after the age of 50 years [2] . The prevalence of renal cysts is approximately 10%, ranging from 4% in the third decade to 19% in the sixth decade [3] . There is an increase in the size and number of cysts over time in cyst-bearing individuals. Previous longterm follow-up data have shown that, simple renal cysts continue to increase in size with age > 10 years, and sometimes increase rapidly, particularly in younger patients [4] . However, this study also showed decreased growth rate of cysts with increased age. Renal cysts originate from weakened of the tubular basement membrane of the distal convoluted or collecting duct cells [2] . As results, a diverticulum is formed, which can subsequently develop into a simple renal cyst [5,6] . The reported risk factors for renal cysts include old age, male gender, renal dysfunction, and hypertension [7] . However, given the retrospective nature of these studies, the associations could be coincidental. The only persistent confounder among all reported associations was increasing age [4,7,8] . Therefore, we analyzed the discrepancy of an increasing rate of simple renal cysts according to initial size, location, and exophytic index stratified using the RENAL nephrometry scoring system in this study. MATERIALS AND METHODS Study populationThis study was conducted after receiving approval from our ABSTRACT AIM: To investigate the growth patterns of renal cysts according to location, exophytic degree and Bosniak classification. METHODS: From December 2000 to September 2012, a total of 252 patients (340 renal cysts) were included in this study. All patients had undergone computed tomography (CT) scans of the kidney level at least twice, and six months apart for any reason. Renal cyst data were assessed according to cyst side (right or left), location (upper, mid or lower), characteristics (Bosniak classification), and exophytic degree (1,2, and 3) which were stratified using the RENAL nephrometry score. The growth rate of renal cyst was analyzed according to each parameter using linear correlation analysis. RESULTS:The mean size of renal cyst increased from 3.81 cm to 3.85 cm during a mean follow-up of 20.1 months, not significantly (p = 0.121). Among 340 renal cyst units, 180 renal cysts had an exophytic degree index of 1 (52.9%), 90 had an index 2 (26.5%), and 70 had an index of 3 (20.6%). After a mean of 20.1 months of follow-up, only exophytic degree 3 renal cysts increased in size significantly from 4.54 to 5.76 cm (p = 0.018). The annual growth rate in exophytic degree 3 renal cysts was 2.4 mm (r 2 = 0.263), which was higher than that for renal cysts at other site locations. CONCLUSION: The growth rate of renal cysts varied according to exophytic location. The growth rate of exophytic renal cysts was

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“…renal neoplasms originating from the renal cyst [4] . These studies indicated that neither the actual size nor size changes were specific to the development of a renal neoplasm.…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Growth of Renal Cysts According to the Exophytic Index of the RENAL Nephrometry Scoring System

Park

Kang

2016

Journal of Nephrology Research

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“…Prevalansı ilerleyen yaşlarda artmakla birlikte toplumda %7-10 olarak bildirilmekte ve erkeklerde iki kat daha fazla görülmektedir (1,2). Çoğu kez asemptomatik olmalarına rağmen böbrek kistleri, hastalarda ağrı, hipertansiyon, hematüri, obstrüksiyon veya kist rüptürü gibi semptomlara sebep olabilmektedir (3,4).…”

Section: Introductionunclassified

Retroperitoneal Laparoscopic Cyst Decortication In the treatment of symptomatic Simple renal cysts

Aydemi̇r¹,

Budak²,

Köse³

et al. 2013

Tepecik Dergisi

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ÖZETAmaç: Bu çalışmada, kliniğimizde semptomatik basit böbrek kistlerinin retroperitoneal laparoskopik yöntem ile tedavisinin sonuçlarını değerlendirdik. Gereç ve Yöntem:Ocak 2011 ve Temmuz 2013 tarihleri arasında semptomatik böbrek kisti nedeniyle retroperitoneal laparoskopik kist dekortikasyonu uyguladığımız 35 hastanın kayıtları incelendi. İzlem süresi yetersiz ya da izlem dışı olan üç hasta çalışma dışı bırakıldı. Hastalar cinsiyet, yaş, semptom, kist yerleşimi, kist büyüklüğü, operasyon süresi, hastanede kalış süresi ve komplikasyon yönüyle değerlendirildi. Bulgular:Hastaların ortalama yaşları 58.43 (±12,9) yıl, 10'nu (%31,2)kadın, 22'si (% 68,8) erkek idi. En sık semptom yan ağrısıydı. Ortalama kist çapı 78.34 (±16.94) mm olarak tespit edildi. Bütün hastalara retroperitoneal yaklaşım uygulandı. Kistlerin 14'ü (%43,7) sağ böbrekte, 18'i (% 56,3) ise sol böbrekte idi. Ortalama hastanede kalış süresi 1,23 (±0.45) gün olup, ortalama operasyon süresi 72.80 (±7.58) dakika olarak gerçekleşti. Bir hastada hemorajik vizyon nedeniyle açık cerrahi yapılmak zorunda kalındı. Bütün kistler Bosniak tip1 ve 2 olarak sınıflandırılmış olup patolojik incelemelerinde malinite bulgusuna rastlanmadı. Hastaların postoperatif 3.ncü ay ultrasonografik kontrollerinde kiste rastlanmadı. Semptomatik başarı oranı %84, radyolojik başarı oranı ise %100 olarak tespit edildi.Sonuç: Basit böbrek kistlerinin tedavisinde, retroperitoneal laparoskopik yöntem, minimal invaziv, güvenli ve etkin bir seçe-nektir. Ayrıca retroperitoneal yaklaşım karıniçi organ yaralanması veya peritonit gibi komplikasyonlardan kaçınılmasını sağ-lar.

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