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Updated: Jan 31, 2026
An Orthotopic Murine Model of Human Prostate Cancer Metastasis
Published on: September 18, 2013
Cystic metastasis of prostate cancer: A case report
Bei Zhang1, Bingyang Bian1, Lirong Bi2
1Department of Radiology.
Rationale:
Prostate cancer often metastasizes (most commonly to the pelvic lymph nodes and axial skeleton); however, metastases to the pelvic cavity as a solitary mass are unusual. While metastatic prostate cancer is unconventional in pelvic cavity, cystic pelvic lesions are even more scarce. Accurate identification of cystic metastasis can be helpful in management of prostate cancer.
Patient Concerns:
A 64-year-old male was admitted to our hospital due to urethral irritation symptom and dysuria.
Diagnosis:
In addition to prostate cancer, abdominal computed tomography (CT) scanning and magnetic resonance imaging (MRI) of the prostate revealed that a cystic mass was located at right pelvic cavity. Histopathological examination diagnosed the pelvic cystic mass as metastasis from prostatic cancer. Immunohistochemistry results demonstrated Calretinin (+), D2-40 (-), Ki-67 (10%+), Vimentin (-), CK-pan (+), CK5/6 (-), WT-1 (-), PSA (+), SALL4 (-), Villin (-), CK20 (-), CK7 (-), PAX-8 (-), and TTF-1 (-).
Interventions:
The cystic mass was removed. Primary cancer of the prostate was reserved as well. After discharge, the patient underwent in a two-year androgen deprivation therapy (ADT) treatment.
Outcomes:
After 13 months of discharge, no disease progression was found in the patient.
Lessons:
Although cystic prostate cancer is rare, the occurrence possibility should be considered when cystic lesions are accompanied with prostate cancer.
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