Cystic prostatic carcinoma: case report and literature review

P: prostate, *: rectum. (c) T1-weighted, (d) T2-weighted, and (e) T1-weighted contrast-enhanced magnetic resonance images showing an enhancing solid component in the superior posterior aspect of the cystic prostatic lesion (arrowheads). (f) Diffusion-weighted and (g) apparent diffusion coefficient magnetic resonance images showing restricted diffusion in the solid component On magnetic resonance imaging (MRI), the mass was again noted between the rectum and the prostate. Cytology revealed necrotic cells and blood cells but no tumour cells. Because of the high suspicion of underlying malignancy, biopsy was repeated under contrast CT guidance. In cystic lesions of the prostate, the presence of blood from aspiration should raise suspicion of malignancy, either the cystic mass is malignant or there is associated prostate carcinoma.9 These aspirates were reported to contain a high concentration of PSA and γ-seminoprotein.12 To obtain histology and confirm the diagnosis, biopsies should be performed on the solid components of the prostatic cystic tumour to maximise the yield. [...]malignant prostatic cysts are rare but an important differential diagnosis in prostatic cystic lesion.