Tumors of the seminal vesicles

Tumors of the seminal vesicles usually represent contiguous invasion of the seminal vesicles from malignancies in adjacent organs, most commonly the prostate. Tumors originating de novo within the seminal vesicles themselves are much rarer.

Epithelial tumors

• adenocarcinoma of the seminal vesicle
  • most common primary malignancy of the seminal vesicles
    • strict criteria for its diagnosis require exclusion of a concurrent prostatic, bladder, or rectal carcinoma
• cystadenoma of the seminal vesicle

Mixed epithelial-stromal tumors (MEST)

• subdivided according to their mitotic activity and necrosis into :
  • low-grade mixed epithelial-stromal tumors (MEST) (benign)
  • intermediate-grade MEST (uncertain malignant potential)
  • high-grade MEST (malignant)
• great majority are benign 
• benign types include
  • fibroadenoma of the seminal vesicles
  • adenomyoma of the seminal vesicles

Mesenchymal tumors

• leiomyosarcoma of the seminal vesicles
• leiomyoma of the seminal vesicles
• angiosarcoma of the seminal vesicles
• malignant fibrous histiocytoma of the seminal vesicles
• solitary fibrous tumor of the seminal vesicles
• liposarcoma of the seminal vesicles
• hemangiopericytoma of the seminal vesicles

Miscellaneous tumors 

• choriocarcinoma: single case report
• schwannoma: single case report
• lymphoma of the seminal vesicles
  • primary
  • secondary
     
• secondary carcinoma of seminal vesicles
  • local invasion from adjacent organs
    • prostate carcinoma
    • bladder carcinoma
    • rectal carcinoma
  • distant metastases (rare)
    • melanoma
    • renal cell carcinoma
    • testicular tumors
    • hepatocellular carcinoma