Lower limb

Iliopectineal (Iliopsoas) and deep pelvic bursae

Bursa iliopectinea et bursae musculorum pelvis

Origin

Between iliopsoas tendon and iliopubic eminence / anterior hip capsule; deep to obturator internus and piriformis tendons

Insertion

Anterior hip joint capsule and lesser trochanter

Function

Largest bursa of the hip (communicates with hip joint in ~15% of adults); cushions iliopsoas excursion over the pelvic brim

Innervation

Femoral and sciatic nerve articular branches (L2–S1)

Movement & chain

Smooth gliding during hip flexion, extension, and stair climbing

Palpation

Palpable deeply in femoral triangle lateral to femoral artery

Clinical

Iliopectineal / iliopsoas bursitis presenting as groin mass/pain; Internal snapping hip syndrome (coxa saltans interna); Piriformis syndrome.

Segmental innervation

L2–S1

In clinical practice

Ultrasound-guided iliopsoas bursa aspiration/injection and eccentric hip flexor lengthening

Region in the model

Lower limb