Gorash Y. The anatomy of the sygmorectal segment in the early stage of ontogenesis

The anatomical study has been carried out on 79 speciment of human fetuses and newborns by means of the methods of anthropometry, intraarterial injection, roentgenography, macromicroscopy, morphometry, sectioning of the sigmorectal segment of human fetuses of the second and third trimesters of the intrauterine development and newborns, an immunohistochemical analysis of the wall of the sigmorectal segment, statistical processing of numerical data. An ultrasound examination of the 16 newborns and 16 infants has been carried out on the ''Toshiba SSA-SSOA'' apparatus with the PSM 50 AT 3 МН sensor within the framework of an elective examination. The most essential results obtained consist in defining the typical anatomical sings of the sigmorectal segment during the perinatal period, variant anatomy of the sigmoid colon, the histostructural organization of the sigmorectal segment, the chronological order of the forming of its topographoanatomical interrelations with the adjacent organs and structures of the abdomen and ultrasonographic parameters in newborns and infants.