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KMID : 0361820110300040271
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Journal of the Korean Society of Medical Ultrasound
2011 Volume.30 No. 4 p.271 ~ p.276
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Midline Cysts in the Prostate: Incidence in Healthy Men on Transrectal Ultrasonography (TRUS)
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Lee Eun-Kyung
Kim Sun-Ho
Lee Yong-Seok
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Abstract
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Purpose: To describe the incidence of prostatic midline cysts in healthy men on transrectal ultrasonography.
Materials & Methods: From 2005 to 2009, 1,175 transrectal ultrasonography examinations were performed on 1,086 men (22-85 years) in a health promotion center. Incidence and size of midline cysts in men without any symptoms in the genitourinary tract were investigated according to age, prostate volume, and other ultrasonography findings.
Results: The incidence of midline cysts in healthy men was 28% (280/999). The mean diameter of midline cysts was 7.2 mm (1-30 mm). The incidence was the highest (32/102; 31.4%) and the size was the smallest (6.2 mm in mean) in men older than 60 years. The incidence of midline cysts in prostates larger than 20 ml was 33.2% (157/473) and in prostates smaller than or equal to 20 ml was 23.4% (123/526) (p < 0.05). Abnormal ultrasonography findings other than midline cysts were found in 196 men, and the incidence of midline cysts was high with seminal vesicle abnormalities (5/11; 45.5%).
Conclusion: The incidence of prostatic midline cysts in healthy men on transrectal ultrasonography is higher than the result of previous studies. The incidence is higher in an enlarged prostate than in a prostate of normal size.
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KEYWORD
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Prostate, Cyst, Ultrasonography, Mu ¨llerian duct
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