In human anatomy, the presacral space is inside the pelvis, behind the rectum and in front of the coccyx and sacrum. Normally it is empty, or it contains...

specific organs or tend to occupy intra-organ spaces. Tumors found in the presacral space and sacral space are most prevalent in children. Tumors occupying...

back of the pelvis) is not formed properly, or there is a mass in the presacral space in front of the sacrum, and there are malformations of the anus or...

point of access for surgery in the pelvic cavity, particularly in the presacral space. Surgeries here include repair of rectal prolapse and anterior meningocele...

preoccipital notch preoptic recess preoptic region prepuce prepyriform cortex presacral space prevertebral fascia primary fissure primary olfactory cortex primary...

meningocele include teratoma and other tumors of the sacrococcyx and of the presacral space, and Currarino syndrome.[citation needed] A meningocele may also form...

fascia divides the retrorectal space into a superior and inferior compartments. Identification and preservation of the presacral fascia is of fundamental importance...

Lumbosacral plexopathy is often caused by recurrence of cancer in the presacral space, and may refer to the external genitalia or perineum. Local recurrence...

Ishii K.; Yuzurihara M.; Asamoto S.; Doi H.; Kubota M. (2007). "A huge presacral Tarlov cyst - Case report". Journal of Neurosurgery: Spine. 7 (2): 259–263...

had paired pneumatic spaces at the base of the neural spines (the spines that projected upwards from the vertebrae). The presacral vertebrae (vertebrae...

endometriosis were not using less pain medication 3 years after the procedure. Presacral neurectomy may be performed where the nerves to the uterus are cut. However...

retroperitoneum. Deep in the pelvis, this fascia coalesces to give rise to presacral fascia. Flexural anatomy is frequently described as a difficult area....

2214/AJR.05.0152. PMID 16985105. Kocaoglu M, Frush DP (2006). "Pediatric presacral masses". Radiographics. 26 (3): 833–857. doi:10.1148/rg.263055102. PMID 16702458...

estimated that the animal would have had a skeleton comprising at least 60 presacral vertebrae. Thalattoarchon would have been an apex predator, its sharp...

cheetahs are: Small head and long lumbar region of the spine, 36.8% of the presacral vertebral column. A tibia and radius longer than the femur and humerus...

aquatic hypothesis by Ibrahim and his colleagues in 2020 overestimated the presacral column length by 10%, ribcage depth by 25%, and forelimb length by 30%...

definition. The characteristics of anuran adults include: 9 or fewer presacral vertebrae, the presence of a urostyle formed of fused vertebrae, no tail...

low-energy conditions at the time of deposition, it was cut off at the seventh presacral vertebra by a thick layer of much coarser sediments consisting of pebbles...

long space in the joint of the maxillary bones and the lack of bone connection between the pterygoid and the maxilla. There were about 20 presacral vertebrae...

difference between the two, in that the African T. liorhinus contained 26 presacrals, while the Antarctic Thrinaxodon had 27 pre-sacrals. In comparison to...

Derived species usually also have a reduced number of dorsals, the total of presacral vertebrae totalling about forty to fifty. The vertebral column is little...

specimen is dorsally brown, with tips of tubercles and suprascapular and presacral ridges cream-colored. There is an indistinct interorbital bar that is...

(12 lb), had a skull of 10 cm (3.9 in) in length, and had 35 cm (14 in) in presacral body length. The largest multituberculate, Taeniolabis taoensis is the...

analyzed, McHenry estimates that Kronosaurus would have had at least 35 presacral vertebrae, including 13 cervical and 5 pectoral vertebra. Unlike Pliosaurus...

of 25 or 26 presacral vertebrae, 3 sacral vertebrae, and approximately 55 caudal vertebrae. C. romeri is distinguished by its widely spaced postzygapophyses...

increase in the overall number of presacral vertebrae during early development). Instead, their overall number of presacral vertebrae remains at a constant...

The skeleton of A. dolani was largely articulated, with the first three presacral vertebrae, the sacrum and 24 caudal vertebrae being anatomically connected...

over the neural spines of the approximately 34 presacral vertebrae. A small dermal bone overlies each space between the posterior expansion of one distal...

are preserved in three dimensions. The only missing parts include some presacral and final caudal vertebrae, as well as some small pieces of the right...

non-temnospondyls. The neural spines tend to be of similar height throughout the presacral region of the trunk, but some temnospondyls exhibit increasing height...