Sartorius is a long, strap-like muscle that runs across the front of the thigh. It helps move both the hip and the knee during walking, climbing, and changing direction. Clinicians commonly reference Sartorius in hip and groin pain evaluations and in knee exams. It is also used as an anatomic landmark and, in select cases, as a surgical muscle flap.

Sacroiliac joint dysfunction is a term used when the sacroiliac (SI) joint is thought to be a meaningful source of pain or impaired movement. The SI joint sits where the spine meets the pelvis, connecting the sacrum to the ilium on each side. It is commonly discussed in evaluations of low back pain, buttock pain, and some forms of hip-region pain. Clinicians use the term to organize diagnosis and guide non-surgical and, in selected cases, procedural care.

The SI joint is the sacroiliac joint, where the sacrum meets the ilium on each side of the pelvis. It helps transfer forces between the spine and the legs during standing, walking, and lifting. In clinical care, the term SI joint is commonly used when discussing certain patterns of low back, buttock, or pelvic pain.

The Sacroiliac joint is the joint between the sacrum (base of the spine) and the ilium (part of the pelvis). It helps transfer forces between the upper body and the legs during standing and walking. Clinicians discuss it most often when evaluating low back, buttock, or posterior hip pain. It is also relevant in imaging, injections, and selected surgical procedures.

Sacrum is a triangular bone at the base of the spine and the back of the pelvis. It connects the lumbar spine to the pelvic bones through the sacroiliac (SI) joints. Sacrum is a common focus in orthopedics, sports medicine, physical therapy, and pain medicine when evaluating low back, buttock, and pelvic pain. It is also used as an anatomical landmark for imaging, injections, and certain pelvic or spine procedures.

Sacral slope is a measurement of how the top of the sacrum tilts when viewed from the side. It helps describe pelvic position and overall posture in the sagittal (side-view) plane. It is most commonly measured on lateral (side-view) spine or pelvis imaging. Clinicians use it to understand hip–pelvis–spine alignment and how it may relate to symptoms or surgical planning.

A Sacral ala fracture is a break in the “wing” (ala) portion of the sacrum, a bone at the base of the spine. It is a type of pelvic fracture that can cause buttock, low back, or groin-area pain. Clinicians commonly discuss it when evaluating unexplained pelvic pain after a fall, overuse, or bone fragility. The term is used in orthopedic care, sports medicine, emergency medicine, radiology, and physical therapy.

Robotic-assisted THA is a form of total hip arthroplasty that uses computer planning and a robotic system to help guide implant positioning. It is still a surgeon-performed hip replacement, with robotic tools used for planning and execution support. It is commonly used in hospitals and surgical centers that perform elective joint replacement. It is typically considered for arthritis-related hip pain and loss of function when non-surgical care is no longer sufficient.

A Right gluteus medius tear is an injury to the gluteus medius tendon or muscle on the right side of the hip. The gluteus medius is a key “hip abductor” that helps keep the pelvis level when you stand or walk. This tear is commonly discussed in orthopedics, sports medicine, and physical therapy when evaluating lateral (outer) hip pain and limping. It may be partial (incomplete) or full-thickness (complete), and can occur from degeneration or trauma.

Right trochanteric bursitis is irritation of a small fluid-filled cushion near the bony outer part of the right hip. It is commonly discussed when people have pain on the outside of the right hip, especially when lying on that side. Clinicians may use the term when describing lateral hip pain patterns and related exam findings. It often overlaps with other causes of outer-hip pain, so the label may be used alongside broader terms.