PMC6327260_01
(a) A high-density lesion (sized 10 mm) is observed in the bladder neck on plain computed tomography images (indicated by a white arrow). A hematoma in the bladder is also observed (indicated by a black arrow). (b) A high-intensity lesion (sized 10 mm) is observed in the bladder neck on plain magnetic resonance T2-weighted images (indicated by a white arrow). A hematoma in the bladder is also observed (indicated by a black arrow). (c) A sessile nodular tumor with a smooth surface (sized 10 mm) located in the direction of 10 o'clock in the bladder neck is observed with cystoscopy (indicated by a white arrow).
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fig1
Plain computed tomography (CT) (Figure 1(a)) and plain magnetic resonance imaging (MRI) (Figure 1(b)) showed a 10-mm nodular tumor in the bladder neck, located in the direction of 10 o'clock. The patient was diagnosed with bladder tumor, and transurethral resection of the bladder tumor (TUR-Bt) was performed in the local clinic (Figure 1(c)).
(a) Alveolar-structured intense proliferation of tumor cells with a large acidophilic cytoplasm accompanied by abundant capillary vessels is observed with hematoxylin and eosin (H&E) staining. (b) The tumor cells are positive for periodic acid-Schiff (PAS) staining. (c) The tumor cells with pachychromatic nuclei are observed with TFE3 staining.
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fig2
Histopathological tests showed alveolar-structured intense proliferation of tumor cells with a large acidophilic cytoplasm accompanied by abundant capillary vessels (Figure 2(a)). Tumor cells were positive for periodic acid-Schiff (PAS) (Figure 2(b)), but negative for PAS after diastase digestion.