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Osteogenic sarcoma of the prostate
T Nishiyama1, T Ikarashi, M Terunuma
1Department of Urology, Koseiren Nagaoka Chuo General Hospital, Niigata, Japan. nkh@niigata-inet.or.jp
Summary
This case report details a rare instance of osteogenic sarcoma of the prostate developing 18 months after treatment for prostate cancer. The aggressive tumor infiltrated local structures, highlighting a potential treatment complication.
Area of Science:
- Oncology
- Pathology
- Urologic Oncology
Background:
- Prostate cancer treatment often involves orchiectomy, estramustine phosphate, and pelvic irradiation.
- Secondary malignancies can occur following cancer therapies.
Observation:
- A 76-year-old male developed osteogenic sarcoma of the prostate 18 months post-treatment for prostate cancer.
- The sarcoma was 8 cm, infiltrating the bladder and rectum with peritoneal dissemination.
Findings:
- Histological examination revealed spindle and pleomorphic cells producing osteoid with calcification.
- Immunohistochemistry was negative for prostate-specific antigen, epithelial membrane antigen, and cytokeratin, but positive for vimentin.
- The tumor lacked the typical tubular formation of prostatic adenocarcinoma.
Implications:
- This case underscores the rare but serious risk of secondary osteogenic sarcoma following prostate cancer treatment.
- Accurate diagnosis through immunohistochemistry is crucial for differentiating this rare sarcoma from primary prostate cancer.