Features are impressive of left tubo-ovarian abscess and left pyosalpinx with an incidental note of left renal duplex collecting system with a ureterocele.

According to Weigert-Meyer law in duplex kidney with complete ureteral duplication, the upper renal moiety ureter has an ectopic insertion inferomedial to the lower renal moiety ureter and frequently ends in a ureterocele and is more prone to obstruction with resultant hydroureteronephrosis that can lead to partial atrophy of the upper renal moiety (as in this case).