Prostatic stromal nodule

Last revised by Yuranga Weerakkody on 4 Sep 2023

Prostatic stromal nodules are type of nodule that can arise from benign prostatic hyperplasia. They may comprise of immature mesenchymal, fibroblastic, fibromuscular and smooth muscular elements.

Radiographic features


They are typically seen in the transitional zone or occasionally may present at ectopic lesions. Usually has a round/oval shape, well defined margins and a thin surrounding pseudo-capsule.

  • T2: typically low T2

  • DWI / ADC: low signal in the ADC map

  • T1 (post contrast): can type 3 enhancement (early wash-in and rapid wash-out) 4

Differential diagnosis

They may mimic prostatic carcinoma in some situations 4.

For more invasive lesions consider other prostatic stromal lesions

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