Cowper's syringocele: diagnosis based on MRI findings.

An 8-year-old boy presenting with intermittent haematuria and dysuria was investigated with voiding cystourethrography (VCUG), urethroscopy and perineal MRI. VCUG and urethroscopy did not provide a definitive diagnosis, while MRI clearly demonstrated a homogeneous, oval cystic lesion extending from the bulbourethral glands and slightly impressing the bulbous urethra. The patient was found to have an imperforate Cowper's syringocele. Treatment consisted of marsupialisation and the patient became symptom free. To the authors' knowledge, this is the first description of the MRI characteristics of an imperforate Cowper's syringocele in a paediatric patient.