there are a number of very different causes , not only malnutrition and prematurity and , in this clinical context , strain plays an important role and may be due to a vesical or urethral stone or to a congenital abnormality of these organs , but also abnormalities of the rectal segment with disorders of innervation , connective tissue diseases , any diseases affecting the internal sphincter , in particular congenital abnormalities .
C0009782
connective
C0012634
diseases