[3]The contents of the ischioanal fossa include the following structures, all prone to lesions or compression: Internal pudendal artery, vein, and nerve. Inferior rectal artery and vein. Inferior rectal nerve. Posterior scrotal vessels and nerves.
Which structure forms the medial wall of the ischioanal fossa?
It Is formed by separation of fascia lunata medially from the obturator fascia laterally. It extends from the lesser sciatic foramen to the to the anterior end of the ischiorectal fossa .
Is the pudendal nerve in the ischioanal fossa?
Pudendal Nerve It accompanies the internal pudendal artery through the lesser sciatic foramen into the pudendal (Alcock’s) canal on the lateral wall of the ischioanal fossa.
Is Ischiorectal and ischioanal fossa same?
The ischioanal fossa (formerly called ischiorectal fossa) is the fat-filled wedge-shaped space located lateral to the anal canal and inferior to the pelvic diaphragm.
What is in the superficial perineal space?
The superficial perineal space contains the erectile tissues, skeletal muscles, and the terminal branches of the internal pudendal vessels and nerves.
Is the Ischioanal fossa in perineum?
The ischioanal (or ischiorectal) fossa is a fat-filled space of the perineum.
What is the perineum made of?
The perineum has a roof formed by the pelvic diaphragm and a floor of fascia and skin. It also contains the muscles and neurovasculature associated with urogenital structures and the anus.
What is an Ischioanal abscess?
Ischiorectal abscesses are the next most common type. These abscesses form when suppuration transverses the external anal sphincter into the ischiorectal space. An ischiorectal abscess may traverse the deep postanal space into the contralateral side, forming a so-called horseshoe abscess.
What is white line of Hilton?
15715. Anatomical terminology. The anocutaneous line, also called the Hilton white line or intersphincteric groove, is a boundary in the anal canal. Below the anocutaneous line, lymphatic drainage is to the superficial inguinal nodes.
What does Ischiorectal mean?
Medical Definition of ischiorectal : of, relating to, or adjacent to both ischium and rectum a pelvic ischiorectal abscess.
What is the ischioanal fossa?
The ischioanal (or ischiorectal) fossa is a fat-filled space of the perineum. The ischioanal fossa is a paired triangular-shaped space lateral to the anal canal with an apex directed anteromedially towards the pubic symphysis.
Where is the ischiorectal fossa located in the pelvis?
Inferior to the pelvic diaphragm is the ischiorectal (ischioanal) fossa; it is packed with pannicular fascia ( Plate 1.8.3, Section D and Plate 1.8.4 ). The anterior and inferior border of the endopelvic fascia fills the retropubic space surrounding the base of the urinary bladder.
Where is the ischioanal fat pad located?
Contents ischioanal (or ischiorectal) fat pad pudendal canal: lies in a fibrous sheath on the lateral wall and itself contains the pudendal nerve and internal pudendal vessels inferior rectal branches of the pudendal nerve posterior scrotal (labral) nerves and vessels perineal branch of S4 perforating cutaneous nerve lymphatic trunks
What causes ischiorectal fossa to become infected?
Ischiorectal fossae are prone to infection due to its location. It is common because the fat in the fossa is poorly vascularized and may get infected from the infections from anal canal or from infections in the perianal skin. The infection from one ischiorectal fossa may pass to other behind the anal canal forming horseshoe shaped abscess.
