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The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known colloquially as the sit bones or sitz bones, [1] or as a pair the sitting bones, [2] is a large posterior bony protuberance on the superior ramus of the ischium. It marks the lateral boundary of the pelvic outlet.
The superior ramus is a partial origin for the internal obturator and the external obturator muscles. The inferior ramus serves partially as origin for part of the adductor magnus muscle and the gracilis muscle. The inferior ischial ramus joins the inferior ramus of the pubis anteriorly and is the strongest of the hip (coxal) bones.
Aneurysmal bone cysts are benign neoformations which can affect any bone. More than half occur in the metaphysis of long bones (especially femur and tibia ) and between 12 and 30% in the spine. They were described in 1893 by Van Arsdale, [ 9 ] who called these lesions "homerus ossifying haematoma".
Ilium (bone) (13 P) Ischium (4 P) P. Pubis (bone) (5 P) Pages in category "Bones of the pelvis" ... Ischial tuberosity; Ischiopubic ramus; Ischium; L. Lesser sciatic ...
These eminences are separated by three notches: one in front, the pubic arch, formed by the convergence of the inferior rami of the ischium and pubis on either side.; The other notches, one on either side, are formed by the sacrum and coccyx behind, the ischium in front, and the ilium above; they are called the sciatic notches; in the natural state they are converted into foramina by the ...
The obturator foramen is situated inferior and somewhat anterior to the acetabulum.It is bounded by the pubis bone and the ischium: superiorly by the (grooved obturator surface) of the superior ramus of pubis, inferiorly by the ramus of ischium, and laterally by (the anterior edge of) the body of ischium (including by the margin of the acetabulum).
The ischiopubic ramus is a compound structure consisting of the following two structures: from the pubis, the bones inferior pubic ramus; from the ischium, the inferior ramus of the ischium; It forms the inferior border of the obturator foramen and serves as part of the origin for the obturator internus and externus muscles.
Early findings of recurrence can be easily treated with minor surgery and curretage. [10] Any fragment of the cyst that is left behind has the potential to survive and grow. Therefore, the success of enucleation depends on how well the cyst is removed. Larger cysts have a higher rate of recurrence after enucleation as they are more difficult to ...