PMC5080517_01
Images from the retrograde pyelogram performed during the initial ureteroscopy and resection. Note that no contrast is passing above the mass (a) and the filling defect from the mass (b) once the ureteric catheter is passed around it.
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fig1
The retrograde pyelogram confirmed the presence of the lesion, with evidence of obstruction in the mid ureter above the lesion (Figure 1).
Retrograde pyelogram conducted at the time of the relook ureterorenoscopy. Note the absence of filling defects and the normal calibre upper tracts.
CRIU2016-1853015.002.jpg
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fig2
The retrograde pyelogram did not demonstrate any filling defects or any evidence of the hydroureter (Figure 2).