case_images: PMC10210528_01
case_images: (a) Longitudinal ultrasonograph of the urinary bladder with the large intraluminal
  bladder mass filling most of the lumen. (b) Longitudinal view of the bladder mass with
  color flow Doppler centered on the apical region. Several vessels extend from the apical
  bladder wall in the mass, suggesting that the mass originated from the apex
case_images: 10.1177_20551169231165247-fig1.jpg
case_images: PMC10210528_01_10.1177_20551169231165247-fig1.jpg
case_images: fig1-20551169231165247
case_images: The mass was poorly echogenic with faint linear hyperechoic striations extending from the center of the mass to the periphery (Figure 1a,b). On color flow Doppler, vascularization of the mass was noted at the apex of the bladder, and faint vessels were also present centrally along some of the subtle striations (Figure 1b).
case_images: (a) Intraoperative image of the bladder. The bladder was firm and filled by a large
  intraluminal mass. A large vascular network can be seen on the serosal surface of the
  bladder wall. (b) Transverse section of the mass that shows ulceration (arrow) near its
  point of attachment to the urinary bladder
case_images: 10.1177_20551169231165247-fig2.jpg
case_images: PMC10210528_01_10.1177_20551169231165247-fig2.jpg
case_images: fig2-20551169231165247
case_images: A partial cystectomy was performed the following day and the 4 x 5 cm ovoid urinary bladder mass was fully excised (Figure 2a). The mass had a 1.5 cm attachment to the apex of the bladder (Figure 2b) and occupied most of the bladder lumen.
case_images: Gross anatomic section of the mass showing its homogeneous consistency
case_images: 10.1177_20551169231165247-fig3.jpg
case_images: PMC10210528_01_10.1177_20551169231165247-fig3.jpg
case_images: fig3-20551169231165247
case_images: The mass did not extend to the cut margin of the resection (Figure 3). After transecting the mass, the internal texture appeared diffusely homogeneous (Figure 3).
case_images: Urinary bladder leiomyoma. Magnification (x 5) of the leiomyoma (*) compressing the
  adjacent submucosa (white arrows) which contains areas of hemorrhage. Hematoxylin and
  eosin. Bar = 200 microm
case_images: 10.1177_20551169231165247-fig4.jpg
case_images: PMC10210528_01_10.1177_20551169231165247-fig4.jpg
case_images: fig4-20551169231165247
case_images: The mass originated from the inner muscular portion of the bladder wall, extended into the submucosa and protruded into the lumen (Figure 4). The mass was composed of neoplastic mesenchymal cells arranged in long interlacing bundles (neoplastic smooth muscle cells) with scant collagenous stroma between the cells (Figure 4).