Trochanteric nonunion is when a break or surgical cut at the hip trochanter does not heal into solid bone. The trochanter is the bony “bump” on the upper femur where important hip muscles attach. This term is commonly used after hip surgery or a trochanteric fracture when healing is delayed or fails. It can be seen on imaging and may or may not cause symptoms.

Trochanteric fossa is a small hollow on the inner (medial) side of the femur’s greater trochanter near the hip. It serves as an attachment area for a deep hip muscle tendon. Clinicians also use it as an anatomical landmark when reading imaging or planning certain hip and femur procedures. It is discussed in orthopedics, sports medicine, and anatomy because of its proximity to key hip stabilizers.

Trochanteric fixation nail is an internal metal implant used to stabilize certain hip and upper femur fractures. It sits inside the thigh bone (femur) and is anchored with screws into the femoral neck and head. It is most commonly used for fractures around the trochanteric region near the hip. It is placed during orthopedic surgery to support bone healing and restore alignment.

Trochanteric crest is a bony ridge on the upper femur (thigh bone) near the hip joint. It sits in the “trochanteric” region, where important muscles attach and where fractures can occur. Clinicians most often discuss it when reading hip imaging or describing surgical anatomy. It is a structural landmark rather than a treatment.

Trochanteric bursitis injection is an injection given near the outside of the hip to calm pain and inflammation. It targets tissues around the greater trochanter, the bony prominence you can feel on the side of the hip. It is commonly used in orthopedics, sports medicine, and physical therapy care pathways for lateral hip pain. It may be used for diagnosis, symptom relief, or to support rehabilitation.

Trochanteric bursitis is inflammation or irritation of a fluid-filled sac near the outer side of the hip. It is commonly associated with pain over the greater trochanter, the bony prominence on the outside of the femur. In everyday care, the term is used to describe a frequent cause of “outside hip pain,” especially with walking or lying on the affected side. Clinicians also use it as part of a broader diagnosis called greater trochanteric pain syndrome.

Trochanteric bursa is a small, fluid-filled sac near the outside of the hip. It helps tissues glide smoothly over the bony prominence called the greater trochanter. It is commonly discussed when evaluating outer-hip pain and related soft-tissue irritation. Clinicians also reference it as an imaging landmark and a potential injection target.

Trial components are temporary implant parts used during joint replacement surgery. They help the surgical team test fit, alignment, and joint function before placing the final implant. Trial components are most commonly used in hip and knee arthroplasty (joint replacement). They are inserted, assessed, and then removed during the same operation.

Triradiate cartilage is a growth cartilage in a child’s pelvis where three pelvic bones meet. It forms part of the socket of the hip joint (the acetabulum) while the pelvis is still growing. Clinicians commonly reference it on X-rays, MRI, or CT when evaluating pediatric hip development and certain injuries. It matters because its growth helps shape hip socket depth and orientation over time.

Transient synovitis hip is a temporary inflammation of the hip joint lining (the synovium). It most often presents as sudden hip, groin, or thigh pain with a limp, especially in children. Clinicians use this term to describe a common, usually short-lived cause of hip discomfort. It is discussed mainly in orthopedic, pediatric, sports medicine, and urgent-care settings.