FDG PET/CT Imaging of Prostate Carcinosarcoma

Area of Science:

• Oncology
• Urologic Pathology
• Medical Imaging

Background:

• Prostate cancer typically presents as adenocarcinoma.
• Carcinosarcoma is a rare and aggressive malignancy with both sarcomatous and carcinomatous elements.
• Previous treatment for squamous cell carcinoma of the prostate adds complexity to diagnosis.

Observation:

• A patient with a history of treated squamous cell carcinoma of the prostate presented with urinary retention.
• Transurethral prostate resection revealed carcinosarcoma.
• F-FDG PET/CT imaging demonstrated moderate to high avidity of the tumor, indicating partial urinary system obstruction and lung metastases.

Findings:

• Prostatic carcinosarcoma exhibits significant F-FDG avidity on PET/CT scans.
• This atypical prostate cancer can cause urinary obstruction and distant metastases.
• FDG PET/CT is valuable for evaluating rare, aggressive prostate cancers.

Implications:

• FDG PET/CT should be considered for staging and monitoring atypical prostate cancers, including carcinosarcoma.
• Early detection and accurate staging are crucial for managing aggressive malignancies.
• This case expands understanding of imaging characteristics for rare prostate tumors.