ABSTRACT
Foetal hydronephrosis is commonly caused bycongenital pelviureteric Junction [PUJ] obstruction.It is either due to nerve deficiency or due to intrinsicmuscular defect at PUJ or it may be due to lowerpolar aberrant crossing vessel just compressing thePUJ. The purpose of this study is to see thecontribution of crossing vessels in causing the PUJobstruction
Aims and objectives: [1] to find thecontribution of crossing vessels in causing PUJobstruction on naked eye examinationperoperatively, [2] To histologicaly verify the causeof PUJ obstruction in cases of crossing vesselscompressing the pelvi-ureteric junction [PUJ]
Patients and methods: 27 cases of Congenital PUJobstruction were taken during four year period whowere candidatesfor operation. All underwent Anderson HynesPyeloplasty and specimen of PUJ with narrowsegment below it was taken and preserved in 10%formalin. The specimen was sent to histopathologistalong with other specimens where PUJ obstructionwas not caused by crossing vessels for nervedetection by S-100 immunohistochemistry and forhistopathological examination
Results: Five out of27 cases of PUJ obstruction were caused by crossingvessels and in these five cases, four [80%] werehaving normal histology showing that crossingvessels were the cause of PUJ obstruction merelycompressing the PUJ mechanically