Magnetic resonance imaging of seminal vesicle cyst associated with ipsilateral urinary anomalies.
BACKGROUND
Seminal vesicle cysts rarely cause symptoms. Data on long-term follow-up from childhood to adulthood are lacking. The study analyzed the magnetic resonance imaging (MRI) and follow-up results of this condition.


METHODS
From 1991 to 1996, seminal vesicle cyst was diagnosed in 13 boys (mean age, 12 years; range, 7-15 years), six of whom had long-term follow-up data. The clinical symptoms and MRI findings at diagnosis and at follow-up were analyzed.


RESULTS
The seminal vesicle cyst was on the right side in six patients and on the left in seven. The size varied, ranging from 1.0 x 1.3 x 1.4 to 4.4 x 3.1 x 3.6 cm. All showed high signal intensity on T2-weighted images but variable signal intensity on T1-weighted images. Associated urinary tract anomalies included renal anomalies (dysplasia in 2 patients, agenesis in 11), ectopic ureteral orifice (11), hydroureter (6), and vertebral anomalies (2). One of the six patients with follow-up had repeated urinary tract infection and underwent surgical resection of the cyst 8 years after the diagnosis. The other five had no symptoms during the follow-up period. Three of the six patients had repeat MRI after a median of 11 years, which showed slight cyst enlargement and increased T1-weighted signal intensity.


CONCLUSIONS
Most seminal vesicle cysts were asymptomatic and did not change during long-term follow-up. MRI is a powerful tool for detecting seminal vesicle cysts and in delineating associated congenital anomalies of the urogenital tract.
Chen
Huan-Wu
HW
Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Taipei, Taiwan, ROC.
Huang
Sheng-Chau
SC
Li
Yiu-Wah
YW
Chen
Shyh-Jye
SJ
Sheih
Chung-Pin
CP
D000293:Adolescent; D002648:Child; D003560:Cysts / Q000175:diagnosis* / Q000601:surgery; D005500:Follow-Up Studies; D005832:Genital Diseases, Male / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011446:Prospective Studies; D012669:Seminal Vesicles / Q000473:pathology* / Q000601:surgery; D014564:Urogenital Abnormalities / Q000175:diagnosis