Fig. 2From: Contrast-enhanced ultrasound of small cell carcinoma in urinary bladder: a case report and review of literatureHistopathology of small cell carcinoma of the bladder. a. Hematoxylin and eosin (H&E) staining of the biopsy specimen revealed nests of small cells with scant cytoplasm and abundant nuclei. b-d. Immunostaining of the biopsy specimen indicated that tumor cells were positive for Syn (b), NSE (c), and CD56 (d). (magnification, ×200)Back to article page