Osteosarcoma of the bladder: a case report

Area of Science:

• Urologic Oncology
• Bone and Soft Tissue Sarcomas

Background:

• Osteosarcoma of the bladder is an exceptionally rare malignancy, with fewer than 40 cases documented.
• This condition typically presents with hematuria and carries a dismal prognosis despite aggressive treatments like surgery, radiation, and chemotherapy.

Observation:

• An 83-year-old male with a history of urothelial carcinoma underwent cystoscopy, revealing a 2-cm bladder tumor.
• The patient had previously undergone transurethral resection for bladder cancer seven years prior.
• Histopathological examination of the new tumor confirmed it as cystosarcoma (osteosarcoma of the bladder).

Findings:

• Due to the patient's advanced age and comorbidities, radical cystectomy was deemed unsuitable.
• The patient underwent a second transurethral resection of bladder tumor, achieving complete tumor removal.
• At 29 months post-surgery, the patient remains alive with no evidence of recurrence.

Implications:

• This case suggests that transurethral resection of bladder tumor may be a viable treatment option for select patients with early-stage bladder osteosarcoma.
• Early detection and prompt intervention, even with less invasive methods, can potentially lead to favorable outcomes in rare bladder cancers.
• Further research is warranted to establish optimal management strategies for bladder osteosarcoma.