HISTORY:
A male patient inhis 60s with known history of metastatic melanoma of the back (stage IV), presented with a bladder mass.
Cystoscopy confirmed a flat black brownish lesion located on the right lateral wall of the bladder measuring 3 cm in size.
The patient underwent a transurethral resection of bladder tumor.
GROSS:
The specimen is designated "bladder lesion" and consists of two fragments of brown-black, ragged, fragile soft tissue.
What is the most likely diagnosis?
- Sarcoma of the urinary bladder
- Endometriosis
- Metastatic melanoma to the bladder
- Blood and hematoma
Metastatic melanoma to the bladder