Small cell carcinoma of the bladder
Bladder mass found incidentally on work up for persistent urinary tract infections. Long smoking history.
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There is an irregular, mildly hypoenhancing 4.7 x 2.1 x 4.2 cm mass along the right bladder wall. No evidence of metastatic disease in the abdomen or pelvis.
Surgical pathology demonstrated muscle-invasive small cell carcinoma arising from invasive high grade urothelial carcinoma.