Large-cell neuroendocrine carcinoma of the bladder: A case report

Figure 1 Computed tomography scan. A and B: Computed tomography (CT) scan of the whole abdomen, showing an irregular mass on the right anterior wall of the bladder. The mass had a size of approximately 30 mm × 29 mm and was observed to project into the lumen (orange arrow); C: Abdominal CT enhancement. The lesion exhibited multiple speckles of hyperdense shadows, which became more pronounced after enhancement (orange arrow).

Figure 2 Histopathologic analysis of the resected specimen. Tumor with a large nest arrangement, showing peripheral fenestrations and rosette knots (orange arrow), together with abundant bright eosinophilic cytoplasm and apoptotic vesicles (black arrow).

Figure 3 Immunohistochemical examination of the resected specimen. Tumor showing a sheet-like growth pattern.