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Table 3 Summary of common periprostatic lesions and characteristic MR findings

From: Incidental findings in and around the prostate on prostate MRI: a pictorial review

Periprostatic lesion

MR findings

Prostatic utricle cyst

High T2, low T1, always in the midline, communicate with urethra

Mullerian duct cyst

High T2, low T1, usually extend above the prostate, no communication with urethra

Cowper’s duct cyst

High T2, low T1, at penile base adjacent to ventral bulbous urethra

Periprostatic haematoma post-biopsy

High T1 and high T2 signal, high T1 signal helps differentiate tumour from post-biopsy haemorrhage, may show a fluid–fluid level

Seminal vesicle cyst

High T2, low T1, may show high T1 signal if associated with haemorrhage

Prostatic retention cyst

High T2, low T1, smooth-walled unilocular cysts, may occur in any glandular zone of the prostate