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1. the region of the body between the anus and the genital organs, including some of the underlying structures
2. the nearly diamond-shaped surface of the human trunk between the thighs
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in man, the anatomical region that comprises the pelvic floor and is located between the apex of the coccyx posteriorly, the apex of the subpubic arch anteriorly, and the ischial tuberosities laterally.

In obstetrics, the perineum is the space between the anus and the posterior commissure of the labia majora. Its bony foundation includes the pelvic ischial tuberosities, the pubic bone, and the coccyx. The perineum also contains muscles, ligaments, fatty tissue, vessels, nerves, and some internal organs. Shaped like a rhombus, it is divided into two triangles by a line that joins the ischial tuberosities; the male urethra or the female urethra and vagina pass through the anterior urogenital triangle. The rectum passes through the posterior, or anal, triangle.

Injuries to the perineum can consist of closed or open wounds. They arise most often with fractures of the pelvic bone when there is a great displacement of fragments (indirect mechanism) or with a blow to the perineum (direct mechanism). On the average, 10 percent of all women suffer perineal ruptures during childbirth, most often with the birth of the first child. The most common diseases of the perineum are suppurative processes near the rectum upon injuries to the rectal mucosa. Surgery is required to treat injuries and suppurative diseases of the perineum.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


The portion of the body included in the outlet of the pelvis, bounded in front by the pubic arch, behind by the coccyx and sacrotuberous ligaments, and at the sides by the tuberosities of the ischium.
The region between the anus and the scrotum in the male, between the anus and the posterior commissure of the vulva in the female.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
successfully reconstructed the pelvic floor and perineum with human ADM and bilateral thigh flaps in a 75-year-old woman after radical debridement.
[2] In the present study, a combination of FGSI >9, debridement beyond the perineum and requirement for organ support were assessed together as a predictor for mortality.
Required stitches: If you needed stitches because you had a tear, these stitches will heal, but sometimes they can leave you with scar tissue at the perineum. This can be really problematic with sex because scar tissue makes everything tighter and more sensitive.
Child was mildly icteric and had multiple erythematous and large bullous lesions of black colour on scalp, lower abdomen, perineum, back and soles of both feet (Figure-2,3).
A recent Scandinavian model of MPP technique recommends a combination of RMPP and conventional perineal protection by bimanual technique: the right hand is spread on the perineum so that the index finger and thumb 'squeeze' the perineum, while the third finger lifts fetal chin (or nose) up while at the same time preventing abrupt deflexion with the left hand; the parturient should not push, and fetal head is released over the perineum in-between labor pains (5).
The ties are then tied around the patient's legs so that the patient's genitalia are elevated away from the anus and perineum. At this point, the perineum is well exposed, and the patient can be prepped and draped for the procedure.
The incident happened during sexual intercourse in doggy position, while he was hurrying to reinsert his penis into the vagina, he struck the perineum of his partner.
If postpartum hemorrhage is suspected, a physical exam should be performed to quickly inspect the uterus, cervix, vulva, and perineum to identify the source of bleeding.
A six-year-old otherwise healthy boy presented to the emergency room with a painless and rapidly enlarging mass in the scrotum and perineum. He denied urinary or gastrointestinal symptoms.
An exam under anesthesia revealed a tract in the mid-portion of the perineum extending deep posterior towards the sacrum approximately eight cm.
For the purpose of the study a single site is considered as an involvement of one body region, either face, head, extremity, chest or abdomen including perineum. While multiple site injury is defined as involvement of more than one of the above mentioned body regions.
Aggressive angiomyxoma (AA) is a rare soft-tissue tumor that is typically found in the perineum of females of reproductive age.