part of part of perineum UBERON:0002356 SCTID:243990009 galen:Perineum EFO:0004141 Wikipedia:Perineum perineal region regio perinealis EHDAA2:0004015 MESH:D010502 Subdivision of trunk proper, which is demarcated from the pelvis by the inferior surface of the pelvic diaphragm and from the lower limbs by the perineofemoral lines; together with the thorax, abdomen, and pelvis, it constitutes the trunk[FMA]. MA:0002466 GAID:90 FMA:9579 EV:0100013 EMAPA:36628 NCIT:C33301 abdominal segment of trunk subdivision of trunk external anal region