Table 1 Commonly seen incidental findings on prostate MRI classified by systems
From: Incidental findings in and around the prostate on prostate MRI: a pictorial review
Space | Benign | Malignant |
|---|---|---|
Prostate and periprostatic region | Seminal vesicle stones, prostate calcifications, utricle cyst*, Mullerian duct cyst*, Cowper’s gland duct cyst, periprostatic haematoma, prostate abscess, periprostatic dermoid *May rarely develop malignant degeneration | Prostate cancer with extraprostatic extension, undifferentiated pleomorphic sarcoma (UPS) of the spermatic cord, spermatic cord lymphoma |
Musculoskeletal | Tumour: intramuscular lipoma, periprostatic leiomyoma and solitary fibrous tumour Non-tumour: degenerative disc disease, avascular necrosis, trochanteric bursitis, tendon ruptures | Skeletal metastasis, soft tissue sarcoma (liposarcoma, leiomyosarcoma, UPS), parachordoma |
Urinary | Bladder diverticula, bladder calculi | Urothelial carcinoma |
Colorectal | Polyps, haemorrhoids, diverticulitis, inguinal hernia, ascites* *May be due to benign or more sinister cause | Rectal adenocarcinoma, rectal villous adenoma, rectal GIST |
Neurovascular | Periprostatic venous varix, aneurysms | Nerve sheath tumours, Lymphadenopathy* *may be reactive, infective/ inflammatory or malignant |