they comment upon the difficulty involved in a preoperative diagnosis and analyse the factors which favour the emigration of the appendix to the scrotum at an early age ( persistence of the peritoneo-vaginal duct , non-joining of the peritoneal membrane , the insertion of the appendix into the end of the caecum and increases in the intraabdominal pressure ) .
C0031153
peritoneal
C0230168
intraabdominal