Fig. 1

Tumor measurements as assessed by CT and Ultrasound. a CT sag 1 – Right parasagittal, post contrast enhanced CT image with the dog’s head to the left and tail to the right. An irregularly margined, soft tissue mass surrounded by less dense fluid (urine) is within the caudodorsal urinary bladder. The length of the mass is 2.3 cm (white arrow). b CT trans 1 – Transverse, post contrast enhanced CT images made through the caudal abdomen/caudal urinary bladder. An irregularly margined, soft tissue mass surrounded by less dense fluid (urine) is within the caudodorsal urinary bladder. The width of the mass (solid white line) is 3.6 cm; the height of the mass is 1.6 cm. A gas bubble is within the right dorsal aspect of the urinary bladder. A portion of the Foley catheter (oblong white structure) is ventral to the gas bubble. c US long – Parasagittal (long axis) ultrasound image of the urinary bladder. The dog’s head is to the left and the tail to the right. An irregularly margined mass is within the caudal urinary bladder. The length of the mass (white line A) is 1.8 cm. d US trans - Transverse (short axis) ultrasound image of the urinary bladder. An irregularly margined mass is within the caudal urinary bladder. The width of the mass (white line B) is 2.61 cm; the height of the mass (dotted white line A) is 1.68 cm